C语言：猜数字游戏

#include<stdio.h>
#include<windows.h>
#include<stdlib.h>
#include<time.h>

void game()
{

  {
    int ret = 0;
    int guess = 0;
    ret = rand() % 100 + 1;
    while (1)
    {
      printf("请猜数字:>");
      scanf("%d", &guess);
      if (guess > ret)
        printf("猜大了\n");
      else if (guess < ret)
        printf("猜小了\n");
      else
      {
        printf("           恭喜你，猜对了！！！");
        Sleep(2000);
        break;
      }
    }

  }
}

void menu()
{
  printf("#######################################\n");
  printf("##         猜数字游戏(1-100)         ##\n");
  printf("##      1.play           0.exit      ##\n");
  printf("#######################################\n");
  printf("请选择:>");
}

int main()
{
  int input = 0;
  do
  {
    srand((unsigned int)time(NULL));
    Sleep(2000);
    system("cls");
    menu();
    scanf("%d", &input);
    switch (input)
    {
    case 1:
      game();
      break;
    case 0:
      printf("退出游戏\n");
      break;
    default:
      printf("选择错误\n");
      break;

    }
  } while (input);

  return 0;
}