C语言猜数字游戏

#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

#include <stdlib.h>
#include <time.h>
void menu()
{
    printf("**********************************
");
    printf("*********** 1.play***************
");
    printf("*********** 0.exit***************
");
    printf("**********************************
");
}
void game()
{
    int random_num = rand() % 100 + 1;
    int input = 0;
    while (1)
    {
        printf("请输入猜的数字>:");
        scanf("%d", &input);
        if (input > random_num)
        {
            printf("猜大了
");
        }
        else if (input < random_num)
        {
            printf("猜小了
");
        }
        else
        {
            printf("恭喜你，猜对了
");
            break;
        }
    }
}
int main()
{
    int input = 0;
    srand((unsigned)time(NULL));
    do
    {
        menu();
        printf("请选择");
            scanf("%d", &input);
        switch (input)
        {
        case 1:
            game();
            break;
        case 0:
            break;
        default:
            printf("选择错误,请重新输入!
");
            break;
        }
    } while (input);
    return 0;
}

//可实现反复游戏

//用srand((unsigned)time(NULL))设置时间种子，从而使得系统每次产生预猜的数字不一样