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1 二分查找/折半查找
2 密码登录
int main()
{
int i =0;
char password[20] = "";
// 假设密码是"123456"
for (i = 0; i < 3; i++)
{
printf("请输入密码：>");
scanf("%s", password);
if (strcmp(password, "123456") == 0)
{
printf("登陆成功\n");
break;
}
else
{
printf("密码错误\n");
}
}
if (i == 3)
{
printf("推出程序\n");
}
return 0;
}
3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 guess = 0;
//猜数字游戏的过程
//生成随机数
int r = rand() % 100 + 1;
while (1)
{//猜数字
printf("猜数字：>");
scanf_s("%d", &guess);
if (guess < r)
{
printf("猜小了\n");
}
else if (guess > r)
{
printf("猜大了 \n");
}
else
{
printf("恭喜你，猜对了\n");
break;
}
}
}
int main()
{
int input = 0;
srand((unsinged int)time(NULL));
do
{
menu();
printf("请选择：>");
scanf_s("%d", &input);
switch (input)
{
case 1:
printf("猜数字\n");
break;
case 0:
printf("退出游戏\n");
break;
default:
printf("选择错误\n");
break;
}
} while (input);
return 0;
}