using System;
namespace PasswordRetry
{
    class Program
    {
        static void Main(string[] args)
        {
            // 预设密码
            string correctPwd = "123456";
            // 记录输入次数
            int tryCount = 0;
            // 存储用户输入的密码
            string inputPwd = "";
 
            // do...while循环：至少执行一次输入操作
            do
            {
                Console.Write("请输入密码：");
                inputPwd = Console.ReadLine();
                tryCount++; // 输入次数加1
 
                // 密码正确的情况
                if (inputPwd == correctPwd)
                {
                    Console.WriteLine("登录成功");
                    break; // 跳出循环，结束验证
                }
                // 密码错误但还有重试次数的情况
                else if (tryCount < 3)
                {
                    Console.WriteLine($"密码错误，还剩{3 - tryCount}次机会");
                }
 
            } while (tryCount < 3); // 最多循环3次
 
            // 3次输入都错误的情况
            if (tryCount >= 3 && inputPwd != correctPwd)
            {
                Console.WriteLine("已锁定");
            }
 
            // 防止控制台直接关闭
            Console.ReadLine();
        }
    }
}
 
 

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