C语言：猜数字游戏

#include<stdio.h>
#include<time.h>
#include<stdlib.h>
void menu()
{
	printf("********************************\n");
	printf("******   1.开始  2.退出   ******\n");
	printf("********************************\n");
}
void game()
{
	int guess = 0;
	int ret = 0;
	ret = rand() % 100 + 1;
	while (1)
	{
		printf("猜个数字：");
		scanf_s("%d", &guess);
		if (guess > ret)
			printf("猜大了\n");
		else if (guess < ret)
			printf("猜小了\n");
		else
		{
			printf("猜对啦\n");
			break;
		}
	}
}
int main()
{
	int input = 0;
	srand((unsigned int)time(NULL));
	do
	{
		menu();
		printf("请选择：");
		scanf_s("%d", &input);
		switch (input)
		{
		case 1:
			game();
			break;
		case 2:
			printf("退出\n");
			goto A;
			break;
		default:
			printf("输入错误\n");
			break;
		}
	} while (input);
	A:return 0;
}