Thread: Custom strcat() function.

hello;

i am trying to write my own version of strcat() that uses pointers. i dont know why its not working; can someone take a look at this piece of code?

thanks in advance

Code:

#include <stdio.h>

char *my_strcat(char *a, char *s_a);

int main(void){
    char x1[30] = "a";
    char x2[10] = "boy";
    my_strcat(x1, x2);

    printf("%s", x1 );

}

char *my_strcat(char *a, char *b){

    while (*a++ != '\0');

    while(*b != '\0'){
        *a++ = *b++;
    }
    *a = '\0';
    return a;
}