完成猜数字游戏

#define _CRT_SECURE_NO_WARNINGS 1
#include<stdlib.h>
#include<time.h>  
#include<stdio.h>  
int menu()  
{
    int choose = 0;
    printf("**************************\n");
    printf("Please choose:\n");
    printf("1.Game\n");
    printf("0.EXIT\n");
    printf("**************************\n");
    while (1)
    {
        scanf("%d", &choose);
        if (1 == choose)
        {
            return 1; 
        }
        else if (0 == choose)
        {
            return -1; 
        }
        else
        {
            printf("Please choose again!\n");  
        }
    }
}
void Game()   
{
    int num = 0;
    int r = 0;
    srand((unsigned)time(NULL));  
    r = rand() % 100; 
    do
    {
        printf("Please input the number you guess:\n");
        scanf("%d", &num);
        if (num > r)
        {
            printf("It is big.\n");
        }
        else if (num < r)
        {
            printf("It is small.\n");
        }
        else
        {
            printf("Congratulations, you guessed it!\n");
            break;
        }
    } while (1);  
}
int main()
{
    int ret = 0;
    while (1)
    {
        ret = menu();
        if (1 == ret)
        {
            Game();
        }
        else
        {
            break;
        }
    }
    return 0;
}

运行结果如下：