猜数字游戏

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
void menu()
{
	    printf("*******************************\n");
	    printf("**************1.play***********\n");
	    printf("**************0.exit***********\n");
		printf("*******************************\n");
}
void game()
{
	int ret = rand() % 100 + 1;
	int guess = 0;
	while (1)
	{
		printf("请猜数字:");
		scanf_s("%d", &guess);
		if (guess < ret)
		{
			printf("猜小了\n");
		}
		else if (guess > ret)
		{
			printf("猜大了\n");
		}
		else
		{
			printf("答案正确\n");
			break;
		}
	}
}

int main()
{
	int input = 0;
	srand((unsigned int)time(NULL));
	do
	{
		menu();//打印菜单
		printf("请选择：");
		scanf_s("%d", &input);
		switch (input)
		{
		case 1:
			game();
			printf("猜数字\n");
			break;
		case 0:
			printf("退出游戏\n");
			break;
		default:
			printf("错误，请重新输入\n");
			break;
		}
	} while (input);

	return 0;
}

使用时间戳生成随机数

取余数加1得到0-100的猜数范围