#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_LENGTH 8

int main(){
  unsigned int string_len;
  unsigned int iterations = 0;
  char *ran_string = (char *)malloc(MAX_LENGTH * sizeof(char)+1);
  int i;

  while(strcmp(ran_string, ":q!\n") != 0){
    iterations++;
    string_len = rand() % MAX_LENGTH;

    for (i = 0; i < string_len; ++i) {
      ran_string[i] = rand() % 127;
    }
    ran_string[++i] = '\0';
  }
  printf("Completed after %d iterations.", iterations);
}