Here is my program :-
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main(void)
{
char arrcTest[256] = {0};
strcat(arrcTest,"Hello");
sprintf(arrcTest,"%s","World");
strcat(arrcTest,"!!");
printf("The String is=> %s\n",arrcTest);
return 0;
}
I compiled it with gcc version 4.8.3 and got the following output :-
The String is=> World!!
Why is strcat not working first time but it's working properly from second time onwards?
sprintf is not the same as strcat. sprintf formats the string and puts it at the beginning of the buffer. strcat, on the other hand, appends the string to the end of the buffer.
strcat(arrcTest,"Hello"); /* after this statement you have "Hello" in arrcTest */
sprintf(arrcTest,"%s","World"); /* after this statement you have "World" in arrcTest */
strcat(arrcTest,"!!"); /* after this statement you have "World!!" in arrcTest */
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