Re: [algogeeks] A simple C question
@nitish
I think using fork() it is not possible , to achieve , what you are
trying to do ..
Because , though address space is shared , but all the variable of
parent process can't be communicated through child process.as they
dont have a shared memory block.where we can place our semaphore.
It would be better if you use , a global variable and 2 threads and
try to show how semaphores work.
Correct Me , if I am wrong ..!!
On Fri, Jun 3, 2011 at 11:26 PM, nicks crazy.logic.k...@gmail.com wrote:
@naveen.. thanks...i got it finally :)
On Fri, Jun 3, 2011 at 10:35 AM, Naveen Kumar naveenkumarve...@gmail.com
wrote:
when we fork a new process, parent gets the PID of the chid as return
value and child will get 0 as return value.
Same address space is copied and both of them start executing this program
in their own address space.
In Modern OSes 99% of the time child comes first so child process is
execute else part and parent will execute if place.
On Fri, Jun 3, 2011 at 10:58 PM, nicks crazy.logic.k...@gmail.com wrote:
i mean why both the if else statements are working by using fork ?
On Fri, Jun 3, 2011 at 10:20 AM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Process don't share address space when forked.
On Fri, Jun 3, 2011 at 10:40 PM, nitish goyal nitishgoy...@gmail.com
wrote:
@ Lalit
You are right.
that's why i am saying how i can use semaphores in the above example
On Fri, Jun 3, 2011 at 10:37 PM, LALIT SHARMA lks.ru...@gmail.com
wrote:
While using fork(), child shares parent address space ,
Correct me If I am wrong ..
On Fri, Jun 3, 2011 at 10:28 PM, nitish goyal nitishgoy...@gmail.com
wrote:
Hi all,
I am stuck with this code..Can anyone tell me how to implement
semaphores in
fork system call
Code:
#includestdio.h
int signal(int *n);
int wait(int *n);
int main()
{
int n;
n=0;
if(fork())
{
printf(Hello);
signal(n);
}
else
{
wait(n);
printf(World);
}
}
int signal(int *n)
{
(*n)++;
}
int wait(int *n)
{
while((*n)=0);
(*n)--;
}
Since parent process and child process will be having different
address
spaces...so change of n in one address space will not be visible to
other.so
please tell me how to make n visible to both the processes
On Fri, Jun 3, 2011 at 2:45 PM, Subhransu
subhransu.panigr...@gmail.com
wrote:
Here you go in C code
http://codepad.org/gk6AZj0T
int main()
{
if(printf(hello)!=0) {
printf(world);
}
else {
printf(SCREWED ! ! !); }
return 0;
}
Subhransu Panigrahi
Mobile: +91-9840931538
Email: subhransu.panigr...@gmail.com
On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
Hi Shachindra,
I don't think letters will be jumbled because we a calling one api
to
output on console tty's driver takes whole line and output it at
once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i
agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C
sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right?
say
world
might get printed first...or maybe the letters can get jumbled
too...We
cannot guarantee the order of execution unless we use
semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal
mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code
prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of
[algogeeks] A simple C question
Please help me in this question. What's the condition so that the following code prints both HelloWorld ! if condition printf (Hello); else printf(World); -- -Arpit Mittal 6th Semester, Indian Institute of Information Technology,Allahabad Email : arpitmittal.ii...@gmail.com rit2008...@iiita.ac.in Contact : +91-8853049787 Let every man be respected as an individual and no man idolized. -- You received this message because you are subscribed to the Google Groups Algorithm Geeks group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
Re: [algogeeks] A simple C question
if (!printf(Hello) printf(Hello); else printf(World); On Fri, Jun 3, 2011 at 11:52 AM, Arpit Mittal mrmittalro...@gmail.comwrote: Please help me in this question. What's the condition so that the following code prints both HelloWorld ! if condition printf (Hello); else printf(World); -- -Arpit Mittal 6th Semester, Indian Institute of Information Technology,Allahabad Email : arpitmittal.ii...@gmail.com rit2008...@iiita.ac.in Contact : +91-8853049787 Let every man be respected as an individual and no man idolized. -- You received this message because you are subscribed to the Google Groups Algorithm Geeks group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en. -- Cheers Naveen Kumar -- You received this message because you are subscribed to the Google Groups Algorithm Geeks group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
Re: [algogeeks] A simple C question
(!printf(Hello)) On Jun 3, 2011 11:52 AM, Arpit Mittal mrmittalro...@gmail.com wrote: Please help me in this question. What's the condition so that the following code prints both HelloWorld ! if condition printf (Hello); else printf(World); -- -Arpit Mittal 6th Semester, Indian Institute of Information Technology,Allahabad Email : arpitmittal.ii...@gmail.com rit2008...@iiita.ac.in Contact : +91-8853049787 Let every man be respected as an individual and no man idolized. -- You received this message because you are subscribed to the Google Groups Algorithm Geeks group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en. -- You received this message because you are subscribed to the Google Groups Algorithm Geeks group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
Re: [algogeeks] A simple C question
can use fork() also.. On Fri, Jun 3, 2011 at 11:57 AM, anand karthik anandkarthik@gmail.com wrote: (!printf(Hello)) On Jun 3, 2011 11:52 AM, Arpit Mittal mrmittalro...@gmail.com wrote: Please help me in this question. What's the condition so that the following code prints both HelloWorld ! if condition printf (Hello); else printf(World); -- -Arpit Mittal 6th Semester, Indian Institute of Information Technology,Allahabad Email : arpitmittal.ii...@gmail.com rit2008...@iiita.ac.in Contact : +91-8853049787 Let every man be respected as an individual and no man idolized. -- You received this message because you are subscribed to the Google Groups Algorithm Geeks group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en. -- You received this message because you are subscribed to the Google Groups Algorithm Geeks group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en. -- You received this message because you are subscribed to the Google Groups Algorithm Geeks group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
Re: [algogeeks] A simple C question
Hi Vishal, Can you show us how it be done with fork? On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki vishaltha...@gmail.comwrote: can use fork() also.. On Fri, Jun 3, 2011 at 11:57 AM, anand karthik anandkarthik@gmail.com wrote: (!printf(Hello)) On Jun 3, 2011 11:52 AM, Arpit Mittal mrmittalro...@gmail.com wrote: Please help me in this question. What's the condition so that the following code prints both HelloWorld ! if condition printf (Hello); else printf(World); -- -Arpit Mittal 6th Semester, Indian Institute of Information Technology,Allahabad Email : arpitmittal.ii...@gmail.com rit2008...@iiita.ac.in Contact : +91-8853049787 Let every man be respected as an individual and no man idolized. -- You received this message because you are subscribed to the Google Groups Algorithm Geeks group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en. -- You received this message because you are subscribed to the Google Groups Algorithm Geeks group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en. -- You received this message because you are subscribed to the Google Groups Algorithm Geeks group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en. -- Cheers Naveen Kumar -- You received this message because you are subscribed to the Google Groups Algorithm Geeks group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
Re: [algogeeks] A simple C question
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal mrmittalro...@gmail.com wrote:
Please help me in this question.
What's the condition so that the following code prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man idolized.
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Re: [algogeeks] A simple C question
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki vishaltha...@gmail.comwrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man idolized.
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Re: [algogeeks] A simple C question
but we can't be sure that it will print hello world or world hello :P
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar naveenkumarve...@gmail.comwrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki vishaltha...@gmail.comwrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man idolized.
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Re: [algogeeks] A simple C question
There can be some synchronisation problems with fork() right? say world
might get printed first...or maybe the letters can get jumbled too...We
cannot guarantee the order of execution unless we use semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar naveenkumarve...@gmail.comwrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki vishaltha...@gmail.comwrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man idolized.
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Re: [algogeeks] A simple C question
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C sachindr...@gmail.comwrote:
There can be some synchronisation problems with fork() right? say world
might get printed first...or maybe the letters can get jumbled too...We
cannot guarantee the order of execution unless we use semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.comwrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki vishaltha...@gmail.comwrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man idolized.
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Re: [algogeeks] A simple C question
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right? say world
might get printed first...or maybe the letters can get jumbled too...We
cannot guarantee the order of execution unless we use semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man idolized.
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Naveen Kumar
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To post
Re: [algogeeks] A simple C question
Hi Shachindra,
I don't think letters will be jumbled because we a calling one api to output
on console tty's driver takes whole line and output it at once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki vishaltha...@gmail.comwrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right? say world
might get printed first...or maybe the letters can get jumbled too...We
cannot guarantee the order of execution unless we use semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man idolized.
--
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Naveen Kumar
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Re: [algogeeks] A simple C question
Here you go in C code
http://codepad.org/gk6AZj0T
int main()
{
if(printf(hello)!=0) {
printf(world);
}
else {
printf(SCREWED ! ! !); }
return 0;
}
*
*
*
*
*Subhransu Panigrahi
*
*Mobile:* *+91-9840931538*
*Email:* subhransu.panigr...@gmail.com
On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar naveenkumarve...@gmail.comwrote:
Hi Shachindra,
I don't think letters will be jumbled because we a calling one api to
output on console tty's driver takes whole line and output it at once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki vishaltha...@gmail.comwrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right? say world
might get printed first...or maybe the letters can get jumbled too...We
cannot guarantee the order of execution unless we use semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal
mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man
idolized.
--
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Re: [algogeeks] A simple C question
Hi all,
I am stuck with this code..Can anyone tell me how to implement semaphores in
fork system call
Code:
#includestdio.h
int signal(int *n);
int wait(int *n);
int main()
{
int n;
n=0;
if(fork())
{
printf(Hello);
signal(n);
}
else
{
wait(n);
printf(World);
}
}
int signal(int *n)
{
(*n)++;
}
int wait(int *n)
{
while((*n)=0);
(*n)--;
}
Since parent process and child process will be having different address
spaces...so change of n in one address space will not be visible to other.so
please tell me how to make n visible to both the processes
On Fri, Jun 3, 2011 at 2:45 PM, Subhransu subhransu.panigr...@gmail.comwrote:
Here you go in C code
http://codepad.org/gk6AZj0T
int main()
{
if(printf(hello)!=0) {
printf(world);
}
else {
printf(SCREWED ! ! !); }
return 0;
}
*
*
*
*
*Subhransu Panigrahi
*
*Mobile:* *+91-9840931538*
*Email:* subhransu.panigr...@gmail.com
On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar
naveenkumarve...@gmail.comwrote:
Hi Shachindra,
I don't think letters will be jumbled because we a calling one api to
output on console tty's driver takes whole line and output it at once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki vishaltha...@gmail.comwrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right? say
world
might get printed first...or maybe the letters can get jumbled
too...We
cannot guarantee the order of execution unless we use semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal
mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man
idolized.
--
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Re: [algogeeks] A simple C question
@vishal
plz help me in understanding fork function...how it is working.??
On Fri, Jun 3, 2011 at 9:58 AM, nitish goyal nitishgoy...@gmail.com wrote:
Hi all,
I am stuck with this code..Can anyone tell me how to implement semaphores
in fork system call
Code:
#includestdio.h
int signal(int *n);
int wait(int *n);
int main()
{
int n;
n=0;
if(fork())
{
printf(Hello);
signal(n);
}
else
{
wait(n);
printf(World);
}
}
int signal(int *n)
{
(*n)++;
}
int wait(int *n)
{
while((*n)=0);
(*n)--;
}
Since parent process and child process will be having different address
spaces...so change of n in one address space will not be visible to other.so
please tell me how to make n visible to both the processes
On Fri, Jun 3, 2011 at 2:45 PM, Subhransu
subhransu.panigr...@gmail.comwrote:
Here you go in C code
http://codepad.org/gk6AZj0T
int main()
{
if(printf(hello)!=0) {
printf(world);
}
else {
printf(SCREWED ! ! !); }
return 0;
}
*
*
*
*
*Subhransu Panigrahi
*
*Mobile:* *+91-9840931538*
*Email:* subhransu.panigr...@gmail.com
On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar
naveenkumarve...@gmail.comwrote:
Hi Shachindra,
I don't think letters will be jumbled because we a calling one api to
output on console tty's driver takes whole line and output it at once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki
vishaltha...@gmail.comwrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C
sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right? say
world
might get printed first...or maybe the letters can get jumbled
too...We
cannot guarantee the order of execution unless we use semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal
mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man
idolized.
--
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Cheers
Naveen Kumar
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Re: [algogeeks] A simple C question
While using fork(), child shares parent address space ,
Correct me If I am wrong ..
On Fri, Jun 3, 2011 at 10:28 PM, nitish goyal nitishgoy...@gmail.com wrote:
Hi all,
I am stuck with this code..Can anyone tell me how to implement semaphores in
fork system call
Code:
#includestdio.h
int signal(int *n);
int wait(int *n);
int main()
{
int n;
n=0;
if(fork())
{
printf(Hello);
signal(n);
}
else
{
wait(n);
printf(World);
}
}
int signal(int *n)
{
(*n)++;
}
int wait(int *n)
{
while((*n)=0);
(*n)--;
}
Since parent process and child process will be having different address
spaces...so change of n in one address space will not be visible to other.so
please tell me how to make n visible to both the processes
On Fri, Jun 3, 2011 at 2:45 PM, Subhransu subhransu.panigr...@gmail.com
wrote:
Here you go in C code
http://codepad.org/gk6AZj0T
int main()
{
if(printf(hello)!=0) {
printf(world);
}
else {
printf(SCREWED ! ! !); }
return 0;
}
Subhransu Panigrahi
Mobile: +91-9840931538
Email: subhransu.panigr...@gmail.com
On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar naveenkumarve...@gmail.com
wrote:
Hi Shachindra,
I don't think letters will be jumbled because we a calling one api to
output on console tty's driver takes whole line and output it at once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki vishaltha...@gmail.com
wrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C
sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right? say
world
might get printed first...or maybe the letters can get jumbled
too...We
cannot guarantee the order of execution unless we use semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal
mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man
idolized.
--
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Cheers
Naveen Kumar
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Re: [algogeeks] A simple C question
@ Lalit
You are right.
that's why i am saying how i can use semaphores in the above example
On Fri, Jun 3, 2011 at 10:37 PM, LALIT SHARMA lks.ru...@gmail.com wrote:
While using fork(), child shares parent address space ,
Correct me If I am wrong ..
On Fri, Jun 3, 2011 at 10:28 PM, nitish goyal nitishgoy...@gmail.com
wrote:
Hi all,
I am stuck with this code..Can anyone tell me how to implement semaphores
in
fork system call
Code:
#includestdio.h
int signal(int *n);
int wait(int *n);
int main()
{
int n;
n=0;
if(fork())
{
printf(Hello);
signal(n);
}
else
{
wait(n);
printf(World);
}
}
int signal(int *n)
{
(*n)++;
}
int wait(int *n)
{
while((*n)=0);
(*n)--;
}
Since parent process and child process will be having different address
spaces...so change of n in one address space will not be visible to
other.so
please tell me how to make n visible to both the processes
On Fri, Jun 3, 2011 at 2:45 PM, Subhransu subhransu.panigr...@gmail.com
wrote:
Here you go in C code
http://codepad.org/gk6AZj0T
int main()
{
if(printf(hello)!=0) {
printf(world);
}
else {
printf(SCREWED ! ! !); }
return 0;
}
Subhransu Panigrahi
Mobile: +91-9840931538
Email: subhransu.panigr...@gmail.com
On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
Hi Shachindra,
I don't think letters will be jumbled because we a calling one api to
output on console tty's driver takes whole line and output it at
once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki vishaltha...@gmail.com
wrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C
sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right? say
world
might get printed first...or maybe the letters can get jumbled
too...We
cannot guarantee the order of execution unless we use semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal
mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints
both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man
idolized.
--
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Groups
Algorithm Geeks group.
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Re: [algogeeks] A simple C question
Process don't share address space when forked.
On Fri, Jun 3, 2011 at 10:40 PM, nitish goyal nitishgoy...@gmail.comwrote:
@ Lalit
You are right.
that's why i am saying how i can use semaphores in the above example
On Fri, Jun 3, 2011 at 10:37 PM, LALIT SHARMA lks.ru...@gmail.com wrote:
While using fork(), child shares parent address space ,
Correct me If I am wrong ..
On Fri, Jun 3, 2011 at 10:28 PM, nitish goyal nitishgoy...@gmail.com
wrote:
Hi all,
I am stuck with this code..Can anyone tell me how to implement
semaphores in
fork system call
Code:
#includestdio.h
int signal(int *n);
int wait(int *n);
int main()
{
int n;
n=0;
if(fork())
{
printf(Hello);
signal(n);
}
else
{
wait(n);
printf(World);
}
}
int signal(int *n)
{
(*n)++;
}
int wait(int *n)
{
while((*n)=0);
(*n)--;
}
Since parent process and child process will be having different address
spaces...so change of n in one address space will not be visible to
other.so
please tell me how to make n visible to both the processes
On Fri, Jun 3, 2011 at 2:45 PM, Subhransu
subhransu.panigr...@gmail.com
wrote:
Here you go in C code
http://codepad.org/gk6AZj0T
int main()
{
if(printf(hello)!=0) {
printf(world);
}
else {
printf(SCREWED ! ! !); }
return 0;
}
Subhransu Panigrahi
Mobile: +91-9840931538
Email: subhransu.panigr...@gmail.com
On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
Hi Shachindra,
I don't think letters will be jumbled because we a calling one api to
output on console tty's driver takes whole line and output it at
once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C
sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right? say
world
might get printed first...or maybe the letters can get jumbled
too...We
cannot guarantee the order of execution unless we use semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal
mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints
both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man
idolized.
--
You received this message because you are subscribed to
the
Google
Groups
Algorithm Geeks group.
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To
Re: [algogeeks] A simple C question
i mean why both the if else statements are working by using fork ?
On Fri, Jun 3, 2011 at 10:20 AM, Naveen Kumar naveenkumarve...@gmail.comwrote:
Process don't share address space when forked.
On Fri, Jun 3, 2011 at 10:40 PM, nitish goyal nitishgoy...@gmail.comwrote:
@ Lalit
You are right.
that's why i am saying how i can use semaphores in the above example
On Fri, Jun 3, 2011 at 10:37 PM, LALIT SHARMA lks.ru...@gmail.comwrote:
While using fork(), child shares parent address space ,
Correct me If I am wrong ..
On Fri, Jun 3, 2011 at 10:28 PM, nitish goyal nitishgoy...@gmail.com
wrote:
Hi all,
I am stuck with this code..Can anyone tell me how to implement
semaphores in
fork system call
Code:
#includestdio.h
int signal(int *n);
int wait(int *n);
int main()
{
int n;
n=0;
if(fork())
{
printf(Hello);
signal(n);
}
else
{
wait(n);
printf(World);
}
}
int signal(int *n)
{
(*n)++;
}
int wait(int *n)
{
while((*n)=0);
(*n)--;
}
Since parent process and child process will be having different address
spaces...so change of n in one address space will not be visible to
other.so
please tell me how to make n visible to both the processes
On Fri, Jun 3, 2011 at 2:45 PM, Subhransu
subhransu.panigr...@gmail.com
wrote:
Here you go in C code
http://codepad.org/gk6AZj0T
int main()
{
if(printf(hello)!=0) {
printf(world);
}
else {
printf(SCREWED ! ! !); }
return 0;
}
Subhransu Panigrahi
Mobile: +91-9840931538
Email: subhransu.panigr...@gmail.com
On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
Hi Shachindra,
I don't think letters will be jumbled because we a calling one api to
output on console tty's driver takes whole line and output it at
once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i
agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C
sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right? say
world
might get printed first...or maybe the letters can get jumbled
too...We
cannot guarantee the order of execution unless we use semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal
mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints
both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man
idolized.
--
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Re: [algogeeks] A simple C question
when we fork a new process, parent gets the PID of the chid as return value
and child will get 0 as return value.
Same address space is copied and both of them start executing this program
in their own address space.
In Modern OSes 99% of the time child comes first so child process is execute
else part and parent will execute if place.
On Fri, Jun 3, 2011 at 10:58 PM, nicks crazy.logic.k...@gmail.com wrote:
i mean why both the if else statements are working by using fork ?
On Fri, Jun 3, 2011 at 10:20 AM, Naveen Kumar
naveenkumarve...@gmail.comwrote:
Process don't share address space when forked.
On Fri, Jun 3, 2011 at 10:40 PM, nitish goyal nitishgoy...@gmail.comwrote:
@ Lalit
You are right.
that's why i am saying how i can use semaphores in the above example
On Fri, Jun 3, 2011 at 10:37 PM, LALIT SHARMA lks.ru...@gmail.comwrote:
While using fork(), child shares parent address space ,
Correct me If I am wrong ..
On Fri, Jun 3, 2011 at 10:28 PM, nitish goyal nitishgoy...@gmail.com
wrote:
Hi all,
I am stuck with this code..Can anyone tell me how to implement
semaphores in
fork system call
Code:
#includestdio.h
int signal(int *n);
int wait(int *n);
int main()
{
int n;
n=0;
if(fork())
{
printf(Hello);
signal(n);
}
else
{
wait(n);
printf(World);
}
}
int signal(int *n)
{
(*n)++;
}
int wait(int *n)
{
while((*n)=0);
(*n)--;
}
Since parent process and child process will be having different
address
spaces...so change of n in one address space will not be visible to
other.so
please tell me how to make n visible to both the processes
On Fri, Jun 3, 2011 at 2:45 PM, Subhransu
subhransu.panigr...@gmail.com
wrote:
Here you go in C code
http://codepad.org/gk6AZj0T
int main()
{
if(printf(hello)!=0) {
printf(world);
}
else {
printf(SCREWED ! ! !); }
return 0;
}
Subhransu Panigrahi
Mobile: +91-9840931538
Email: subhransu.panigr...@gmail.com
On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
Hi Shachindra,
I don't think letters will be jumbled because we a calling one api
to
output on console tty's driver takes whole line and output it at
once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i
agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C
sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right?
say
world
might get printed first...or maybe the letters can get jumbled
too...We
cannot guarantee the order of execution unless we use
semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal
mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code prints
both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man
idolized.
--
You received this message because you are subscribed to
the
Google
Groups
Algorithm Geeks group.
To post to this group, send email to
algogeeks@googlegroups.com.
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For more options, visit this group at
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You received this
Re: [algogeeks] A simple C question
@naveen.. thanks...i got it finally :)
On Fri, Jun 3, 2011 at 10:35 AM, Naveen Kumar naveenkumarve...@gmail.comwrote:
when we fork a new process, parent gets the PID of the chid as return value
and child will get 0 as return value.
Same address space is copied and both of them start executing this program
in their own address space.
In Modern OSes 99% of the time child comes first so child process is
execute else part and parent will execute if place.
On Fri, Jun 3, 2011 at 10:58 PM, nicks crazy.logic.k...@gmail.com wrote:
i mean why both the if else statements are working by using fork ?
On Fri, Jun 3, 2011 at 10:20 AM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Process don't share address space when forked.
On Fri, Jun 3, 2011 at 10:40 PM, nitish goyal nitishgoy...@gmail.comwrote:
@ Lalit
You are right.
that's why i am saying how i can use semaphores in the above example
On Fri, Jun 3, 2011 at 10:37 PM, LALIT SHARMA lks.ru...@gmail.comwrote:
While using fork(), child shares parent address space ,
Correct me If I am wrong ..
On Fri, Jun 3, 2011 at 10:28 PM, nitish goyal nitishgoy...@gmail.com
wrote:
Hi all,
I am stuck with this code..Can anyone tell me how to implement
semaphores in
fork system call
Code:
#includestdio.h
int signal(int *n);
int wait(int *n);
int main()
{
int n;
n=0;
if(fork())
{
printf(Hello);
signal(n);
}
else
{
wait(n);
printf(World);
}
}
int signal(int *n)
{
(*n)++;
}
int wait(int *n)
{
while((*n)=0);
(*n)--;
}
Since parent process and child process will be having different
address
spaces...so change of n in one address space will not be visible to
other.so
please tell me how to make n visible to both the processes
On Fri, Jun 3, 2011 at 2:45 PM, Subhransu
subhransu.panigr...@gmail.com
wrote:
Here you go in C code
http://codepad.org/gk6AZj0T
int main()
{
if(printf(hello)!=0) {
printf(world);
}
else {
printf(SCREWED ! ! !); }
return 0;
}
Subhransu Panigrahi
Mobile: +91-9840931538
Email: subhransu.panigr...@gmail.com
On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
Hi Shachindra,
I don't think letters will be jumbled because we a calling one api
to
output on console tty's driver takes whole line and output it at
once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i
agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C
sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right?
say
world
might get printed first...or maybe the letters can get jumbled
too...We
cannot guarantee the order of execution unless we use
semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal
mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code
prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man
idolized.
--
You received this message because you are subscribed to
the
Google
Groups
Algorithm Geeks group.
To post to this group, send email to
algogeeks@googlegroups.com.
To unsubscribe from this group, send email to
algogeeks+unsubscr...@googlegroups.com.
For
Re: [algogeeks] A simple C question
But if i have to make sure that hello should be printed first, then i have
to apply synchronization.
please answer my question. how we can semaphores over here
On Fri, Jun 3, 2011 at 11:26 PM, nicks crazy.logic.k...@gmail.com wrote:
@naveen.. thanks...i got it finally :)
On Fri, Jun 3, 2011 at 10:35 AM, Naveen Kumar
naveenkumarve...@gmail.comwrote:
when we fork a new process, parent gets the PID of the chid as return
value and child will get 0 as return value.
Same address space is copied and both of them start executing this program
in their own address space.
In Modern OSes 99% of the time child comes first so child process is
execute else part and parent will execute if place.
On Fri, Jun 3, 2011 at 10:58 PM, nicks crazy.logic.k...@gmail.comwrote:
i mean why both the if else statements are working by using fork ?
On Fri, Jun 3, 2011 at 10:20 AM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Process don't share address space when forked.
On Fri, Jun 3, 2011 at 10:40 PM, nitish goyal
nitishgoy...@gmail.comwrote:
@ Lalit
You are right.
that's why i am saying how i can use semaphores in the above example
On Fri, Jun 3, 2011 at 10:37 PM, LALIT SHARMA lks.ru...@gmail.comwrote:
While using fork(), child shares parent address space ,
Correct me If I am wrong ..
On Fri, Jun 3, 2011 at 10:28 PM, nitish goyal nitishgoy...@gmail.com
wrote:
Hi all,
I am stuck with this code..Can anyone tell me how to implement
semaphores in
fork system call
Code:
#includestdio.h
int signal(int *n);
int wait(int *n);
int main()
{
int n;
n=0;
if(fork())
{
printf(Hello);
signal(n);
}
else
{
wait(n);
printf(World);
}
}
int signal(int *n)
{
(*n)++;
}
int wait(int *n)
{
while((*n)=0);
(*n)--;
}
Since parent process and child process will be having different
address
spaces...so change of n in one address space will not be visible to
other.so
please tell me how to make n visible to both the processes
On Fri, Jun 3, 2011 at 2:45 PM, Subhransu
subhransu.panigr...@gmail.com
wrote:
Here you go in C code
http://codepad.org/gk6AZj0T
int main()
{
if(printf(hello)!=0) {
printf(world);
}
else {
printf(SCREWED ! ! !); }
return 0;
}
Subhransu Panigrahi
Mobile: +91-9840931538
Email: subhransu.panigr...@gmail.com
On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
Hi Shachindra,
I don't think letters will be jumbled because we a calling one api
to
output on console tty's driver takes whole line and output it at
once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i
agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C
sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right?
say
world
might get printed first...or maybe the letters can get jumbled
too...We
cannot guarantee the order of execution unless we use
semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011 11:52 AM, Arpit Mittal
mrmittalro...@gmail.com
wrote:
Please help me in this question.
What's the condition so that the following code
prints both
HelloWorld !
if condition
printf (Hello);
else
printf(World);
--
-Arpit Mittal
6th Semester,
Indian Institute of Information Technology,Allahabad
Email : arpitmittal.ii...@gmail.com
rit2008...@iiita.ac.in
Contact : +91-8853049787
Let every man be respected as an individual and no man
idolized.
--
You received this message because you are subscribed
Re: [algogeeks] A simple C question
to use the semaphores, you have to allocate them using shared memory.
as once you call fork(), both the process will have their own data, so
the semaphores allocated in parent will differ from child. you can
have a shared memory (man shmget) to allocate semaphores and use it..
btw, i think we are missing the essence of the question here. the code
needs a condition so that both if and else gets executed. the
printf(hello) and printf(world) are just instructions in both the
code. the order doesn't matter when you have both the code executed.
On Fri, Jun 3, 2011 at 11:55 PM, nitish goyal nitishgoy...@gmail.com wrote:
But if i have to make sure that hello should be printed first, then i have
to apply synchronization.
please answer my question. how we can semaphores over here
On Fri, Jun 3, 2011 at 11:26 PM, nicks crazy.logic.k...@gmail.com wrote:
@naveen.. thanks...i got it finally :)
On Fri, Jun 3, 2011 at 10:35 AM, Naveen Kumar naveenkumarve...@gmail.com
wrote:
when we fork a new process, parent gets the PID of the chid as return
value and child will get 0 as return value.
Same address space is copied and both of them start executing this
program in their own address space.
In Modern OSes 99% of the time child comes first so child process is
execute else part and parent will execute if place.
On Fri, Jun 3, 2011 at 10:58 PM, nicks crazy.logic.k...@gmail.com
wrote:
i mean why both the if else statements are working by using fork ?
On Fri, Jun 3, 2011 at 10:20 AM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Process don't share address space when forked.
On Fri, Jun 3, 2011 at 10:40 PM, nitish goyal nitishgoy...@gmail.com
wrote:
@ Lalit
You are right.
that's why i am saying how i can use semaphores in the above example
On Fri, Jun 3, 2011 at 10:37 PM, LALIT SHARMA lks.ru...@gmail.com
wrote:
While using fork(), child shares parent address space ,
Correct me If I am wrong ..
On Fri, Jun 3, 2011 at 10:28 PM, nitish goyal
nitishgoy...@gmail.com wrote:
Hi all,
I am stuck with this code..Can anyone tell me how to implement
semaphores in
fork system call
Code:
#includestdio.h
int signal(int *n);
int wait(int *n);
int main()
{
int n;
n=0;
if(fork())
{
printf(Hello);
signal(n);
}
else
{
wait(n);
printf(World);
}
}
int signal(int *n)
{
(*n)++;
}
int wait(int *n)
{
while((*n)=0);
(*n)--;
}
Since parent process and child process will be having different
address
spaces...so change of n in one address space will not be visible to
other.so
please tell me how to make n visible to both the processes
On Fri, Jun 3, 2011 at 2:45 PM, Subhransu
subhransu.panigr...@gmail.com
wrote:
Here you go in C code
http://codepad.org/gk6AZj0T
int main()
{
if(printf(hello)!=0) {
printf(world);
}
else {
printf(SCREWED ! ! !); }
return 0;
}
Subhransu Panigrahi
Mobile: +91-9840931538
Email: subhransu.panigr...@gmail.com
On Fri, Jun 3, 2011 at 1:57 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
Hi Shachindra,
I don't think letters will be jumbled because we a calling one
api to
output on console tty's driver takes whole line and output it
at once.
On Fri, Jun 3, 2011 at 12:40 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
@sachindra, @naveen,
this was just a plain trick to execute if and else block. i
agree
with your concerns :)
2011/6/3 Vιиodh vinodh...@gmail.com:
@vishal:
can u explain the fork() solution??
On Fri, Jun 3, 2011 at 12:16 PM, Shachindra A C
sachindr...@gmail.com
wrote:
There can be some synchronisation problems with fork() right?
say
world
might get printed first...or maybe the letters can get
jumbled
too...We
cannot guarantee the order of execution unless we use
semaphores.
On Fri, Jun 3, 2011 at 12:14 PM, Naveen Kumar
naveenkumarve...@gmail.com
wrote:
oh yes,
gud one
On Fri, Jun 3, 2011 at 12:12 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
vishal@ubuntu:~/progs/c\ 12:11:53 PM $ cat fork.c
#include stdio.h
#include stdlib.h
int main()
{
if (fork()) {
printf(hello );
} else {
printf(world\n);
}
return 0;
}
vishal@ubuntu:~/progs/c\ 12:11:56 PM $ gcc fork.c
vishal@ubuntu:~/progs/c\ 12:12:06 PM $ ./a.out
hello world
On Fri, Jun 3, 2011 at 12:09 PM, Naveen Kumar
naveenkumarve...@gmail.com wrote:
Hi Vishal,
Can you show us how it be done with fork?
On Fri, Jun 3, 2011 at 12:02 PM, Vishal Thanki
vishaltha...@gmail.com
wrote:
can use fork() also..
On Fri, Jun 3, 2011 at 11:57 AM, anand karthik
anandkarthik@gmail.com wrote:
(!printf(Hello))
On Jun 3, 2011
