[algogeeks] c output doubt

[rohit]

int main()
{
int a[5]={1,2,3,4,5};
printf(%d,a[4]-a[0])
}
why it show 4 not 16?

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Re: [algogeeks] c output doubt

[Avinash Dharan]

Pointer incrementation and subtraction are done in terms of memory blocks
and not addresses of memory.
For example,

int *p;
p++;

The pointer here jumps to the next integer location and not the next address
in memory.
Similarly,pointer subtraction will give the difference in indexes and not
the memory addresses.
If you try subtracting an integer pointer and a float pointer, it will be an
error.

On Fri, Aug 12, 2011 at 11:34 AM, rohit rajuljain...@gmail.com wrote:


 int main()
 {
 int a[5]={1,2,3,4,5};
 printf(%d,a[4]-a[0])
 }
 why it show 4 not 16?

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Re: [algogeeks] c output doubt

[Varun Jakhoria]

i didn't tried it  .. but it might  be internal conversion only , like
whenever we do +1 to the address of int it automatically convert it
into +4(i.e int size)

On Fri, Aug 12, 2011 at 11:34 AM, rohit rajuljain...@gmail.com wrote:

 int main()
 {
 int a[5]={1,2,3,4,5};
 printf(%d,a[4]-a[0])
 }
 why it show 4 not 16?

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-- 
Varun Jakhoria
...it's only about 0's  1's

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Re: [algogeeks] c output doubt

[siddharam suresh]

4*(sizeof(int *))
Thank you,
Siddharam


On Fri, Aug 12, 2011 at 11:56 AM, Varun Jakhoria varunjakho...@gmail.comwrote:

 i didn't tried it  .. but it might  be internal conversion only , like
 whenever we do +1 to the address of int it automatically convert it
 into +4(i.e int size)

 On Fri, Aug 12, 2011 at 11:34 AM, rohit rajuljain...@gmail.com wrote:
 
  int main()
  {
  int a[5]={1,2,3,4,5};
  printf(%d,a[4]-a[0])
  }
  why it show 4 not 16?
 
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 --
 Varun Jakhoria
 ...it's only about 0's  1's

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Re: [algogeeks] c output doubt

[Avinash Dharan]

On Fri, Aug 12, 2011 at 11:55 AM, Avinash Dharan avinashdha...@gmail.comwrote:

 Pointer incrementation and subtraction are done in terms of memory blocks
 and not addresses of memory.
 For example,

 int *p;
 p++;

 The pointer here jumps to the next integer location and not the next
 address in memory.
 Similarly,pointer subtraction will give the difference in indexes and not
 the memory addresses.
 If you try subtracting an integer pointer and a float pointer, it will be
 an error.


 On Fri, Aug 12, 2011 at 11:34 AM, rohit rajuljain...@gmail.com wrote:


 int main()
 {
 int a[5]={1,2,3,4,5};
 printf(%d,a[4]-a[0])
 }
 why it show 4 not 16?

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 Algorithm Geeks group.
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 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.




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