strcpy using pointers

Question

I\'m trying to write strcpy on my own using pointers and I get an error during runtime.

void str_cpy(char **destination, const char *source) {
//    char *s1         


        

Answer 1

I don't see any need to pass a pointer-to-pointer:

void str_cpy(char *dst, const char *src) {
   while (*src != '\0') {
      *dst++ = *src++; 
   }
   *dst = '\0';
}

And you need to allocate memory for dst before passing:

const char *src = "String";
char *str = malloc(strlen(src)+1); //plus one for null byte
str_cpy(dst, src);