MESSAGE
| DATE | 2005-01-26 |
| FROM | Ruben Safir Secretary NYLXS
|
| SUBJECT | Re: [hangout] Simple C question
|
Document pelase because it works just fine
#include
#include
char a[]="Hello Earth";
char b[]="Hello Moon";
int main(int argc, char ** argv){
strncpy(a,b,10);
printf("%s\n",a);
exit;
}
ruben-at-www2:~> ./a.out
Hello Moonh
On Wed, Jan 26, 2005 at 10:52:06PM -0500, Billy wrote:
>
> Ruben Safir wrote:
> >On Tue, 2005-01-25 at 16:03, Billy wrote:
> >
> >>Inker, Evan wrote:
> >>>
> >>>#include
> >>>#include
> >>>
> >>>void strcopy(const char *, char *);
> >>>
> >>>int main() {
> >>> char string1[] = "This is string1";
> >>> char string2[] = "This is string2";
> >>>
> >>> strcopy(string1, string2);
> >>> printf("String2: %s", string2);
> >>>}
> >>>
> >>>void strcopy(const char * str1, char * str2) {
> >>> int x = 0;
> >>>
> >>> /* change the size of string2 to the size of string1 */
> >>> realloc(str2, sizeof(str1));
> >>>
> >>> do {
> >>> str2[x] = str1[x];
> >>> } while (str1[x++] != '\0');
> >>>
> >>>}
> >>
> >>
> >>This program is incorrect.
> >>YOU CANNOT overwrite the contents of string2.
> >
> >
> >
> >Why not? It is not a string literal.
>
> char string2[] = "This is string2";
>
> Yes it is.
>
> >
> >>It is also illegal to
> >>realloc() a pointer which was not obtained by malloc().
> >>also, realloc is free to move the block. you have to use its return
> >>value to update the pointer. There's just so much wrong...
> >>
> >>I DON'T RECOMMEND learning from this example.
> >>
> >
> >
> >I agree. There is no reason to rewrite strncpy
>
>
> ____________________________
> NYLXS: New Yorker Free Software Users Scene
> Fair Use -
> because it's either fair use or useless....
> NYLXS is a trademark of NYLXS, Inc
--
__________________________
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____________________________
NYLXS: New Yorker Free Software Users Scene
Fair Use -
because it's either fair use or useless....
NYLXS is a trademark of NYLXS, Inc
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