#include <stdio.h>
#include <string.h>

void copy_string_( char *str_src, char *str_dst ){
  strcpy(str_dst, str_src);

  printf("C function\n");
  printf("str_src: %s, strlen(str_src): %ld\n", str_src, strlen(str_src));
  printf("str_dst: %s, strlen(str_dst): %ld\n", str_dst, strlen(str_dst));
}