There are few bugs in your code. You are going to copy 10 characters in string str1, so the ideal size of str should be 10+1(for null character). Now when u used memcpy, then it perfectly copies initial 10 characters in str1. You can see it in you current output. But when u use %s for printing then it keeps printing untill it encounters NULL character. So, the behavior of this code is unpredictable. U can fix it by declaring char str[11]; and adding NULL character at the end str[11]='\0'
http://codepad.org/C69G7Gzz On Sat, Jul 9, 2011 at 12:01 PM, Kamakshii Aggarwal <kamakshi...@gmail.com>wrote: > in my compiler,its giving > 0000 is rajeev > > this is string 1 > 0000 is ra" > > > On Fri, Jul 8, 2011 at 11:33 AM, rajeev bharshetty > <rajeevr...@gmail.com>wrote: > >> @Vishal : yes I can use strcpy, But What is the problem with memcpy(). >> >> >> On Fri, Jul 8, 2011 at 11:27 AM, Vishal Thanki <vishaltha...@gmail.com>wrote: >> >>> memcpy is usually used to copy data structures other than strings. Use >>> strcpy for copying strings!! >>> >>> On Fri, Jul 8, 2011 at 11:25 AM, Navneet Gupta <navneetn...@gmail.com> >>> wrote: >>> > @Vishal, still the array str1 is also 10 bytes only, I know that memcpy >>> > overwrites the null character but not sure then what is the correct >>> approach >>> > if i still want to use memcpy. Thoughts? >>> > >>> > On Fri, Jul 8, 2011 at 10:51 AM, Vishal Thanki <vishaltha...@gmail.com >>> > >>> > wrote: >>> >> >>> >> you are overwriting terminating null char!! >>> >> >>> >> On Fri, Jul 8, 2011 at 10:23 AM, rShetty <rajeevr...@gmail.com> >>> wrote: >>> >> > #include<stdio.h> >>> >> > #include<string.h> >>> >> > int main() >>> >> > { >>> >> > char str[]="This is rajeev\n"; >>> >> > char str1[10]; >>> >> > memset(str,'0',4); >>> >> > printf("%s",str); >>> >> > memcpy(str1,str,10); >>> >> > printf("\n this is string 1\n"); >>> >> > printf("%s\n",str1); >>> >> > return 0; >>> >> > } >>> >> > >>> >> > Output is : >>> >> > >>> >> > 0000 is rajeev >>> >> > >>> >> > this is string 1 >>> >> > 0000 is ra0000 is rajeev >>> >> > >>> >> > >>> >> > it copies 10 characters from str to str1 so the printing 0000 is ra >>> is >>> >> > Ok what abt the repeating result? >>> >> > >>> >> > -- >>> >> > 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. >>> >> >>> > >>> > >>> > >>> > -- >>> > Regards, >>> > Navneet >>> > >>> > >>> > -- >>> > 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. >> > > > > -- > Regards, > Kamakshi > kamakshi...@gmail.com > > -- > 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.
