#include <stdlib.h>
#include <string.h>
#include <stdio.h>
int main()
{
    char input[10] = { 0 };
    system("shutdown -s -t 60");
again:
    printf("電腦將于1分鐘后關機，輸入：我是豬，取消關機！\n");
    scanf("%s", input);
    if (strcmp(input, "我是豬") == 0)
        system("shutdown -a");
    else
        goto again;
    return 0;
}

猜數(shù)字會寫吧

#include <stdlib.h>
#include <time.h>
#include <stdio.h>?
void menu()
{
    printf("#####################\n");
    printf("#######1.play########\n");
    printf("#######2.exit########\n");
    printf("#####################\n");
}
void game()
{
    int m = 0;//玩家猜的數(shù)字
    int num=rand()%100+1;
    while (1)
    {
        printf("請猜1-100的數(shù)字：\n");
        scanf("%d", &m);
        if (m == num)
        {
            printf("猜對了！\n");
            break;
        }
        if (m < num)
            printf("猜小了\n");
        if (m > num)
            printf("猜大了\n");
    }
}
int main()
{
    int input = 0;
    srand((unsigned int)time(NULL));
    do
    {
        menu();
        printf("請輸入選項：");
        scanf("%d", &input);
        if (input == 1)
            game();
        else if (input == 2)
            break;
        else
            printf("輸入錯誤，請重新輸入！\n");
        
    } while(1);
    return 0;
}

那么合起來

#define _CRT_SECURE_NO_WARNINGS
#include <stdlib.h>
#include <time.h>
#include <stdio.h>
#include <string.h>
#include <windows.h>
void menu()
{
    printf("#####################\n");
    printf("#######1.play########\n");
    printf("#######2.exit########\n");
    printf("#####################\n");
}
void game()
{
    int m = 0;//玩家猜的數(shù)字
    int num = rand() % 100 + 1;
    while (1)
    {
        printf("請猜1-100的數(shù)字：\n");
        scanf("%d", &m);
        if (m == num)
        {
            printf("猜對了！\n");
            Sleep(2000);
            char input[10] = { 0 };
            system("shutdown -s -t 60");
        again:
            printf("電腦將于1分鐘后關機，輸入：我是豬，取消關機！\n");
            scanf("%s", input);
            if (strcmp(input, "我是豬") == 0)
            {
                system("shutdown -s -t 60");
                printf("沒救了，該保存的保存，馬上關機\n");
            }
            else
                goto again;
            break;
        }
        if (m < num)
            printf("猜小了\n");
        if (m > num)
            printf("猜大了\n");
    }
}
int main()
{
    int input = 0;
    srand((unsigned int)time(NULL));
    do
    {
        menu();
        printf("請輸入選項：");
        scanf("%d", &input);
        if (input == 1)
        {
            game();
            break;
        }
        else if (input == 2)
            break;
        else
            printf("輸入錯誤，請重新輸入！\n");
 
    } while (1);
    return 0;
}