源代码如下:

#include<stdio.h>
#include<stdlib.h>
#include<time.h>//生成随机函数起点时用到time.h
int main()
{
	int number1 = 0, choice = 0, number2 = 0;
	printf("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$\n");//界面设置
	printf("$$$$$     欢          迎             来           到     $$$$$\n");
	printf("$$$$$          猜     数      字     游      戏          $$$$$\n");
	printf("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$\n");
	printf("                         1.进入游戏\n");
	printf("                         2.退出游戏\n");
	scanf("%d", &choice);
		srand((unsigned int)time(NULL));//设置随机数起点
		while (choice == 1)
		{
			printf("请输入所猜的数:\n");
			scanf("%d", &number2);
			number1 = rand() % 100;
			while (1)
			{

				if (number2 == number1)
				{
					printf("666 恭喜你答对了!");
					printf("\n1.再玩一次\n2.退出游戏\n");
					scanf("%d", &number2);
					if (number2 == 1)
						break;
					if (number2 == 2)
						return 0;
				}

				if (number2 < number1)
				{
					printf("\n猜小了!\n");
					scanf("%d", &number2);
				}
				if (number2 > number1)
				{
					printf("\n猜大了!\n");
					scanf("%d", &number2);
				}
			}
		}
	while(choice == 2)
	{
		return 0;
	}
	system("pause");
	return 0;
}

运行结果: