overflow_attack.c

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

int main(void) {
  char pw[8] = "pass";
  char in[8];
  while (1) {
    scanf("%s", in);
    if (strcmp(in, pw) == 0) {
      printf("yes\n");
      break;
    } else {
      printf("no\n");
    }
  }
  
  return 0;
}