Console.WriteLine("请输入你的密码：");
string mima = "111111";
int amount = 0;
int count = 0;
for (count = 0; count < 3; count++)
{
string shuru = Console.ReadLine();
if (shuru != mima)
{
Console.WriteLine("你输入的密码有误，重新输入。");
continue;
}
else
{
Console.WriteLine("请输入金额");
amount = Convert.ToInt32(Console.ReadLine());
break;
}
}

        for (int i = 0; i < 3; i++)
        {
            if (amount < 0 | amount > 1000 | amount %100 != 0 )
            {
                Console.WriteLine("你输入的不合法，请重新输入");
                amount = Convert.ToInt32(Console.ReadLine());
                continue;
            }
            else
            {
                Console.WriteLine("您取了{0}块钱", amount);
                Console.WriteLine("\n" + "交易完成");
                break;
            }
            
        }
        Console.ReadKey();