using System;

public class Program

{

    public static void Main()

    {

        double pay=0;

        Console.WriteLine("請輸入金額");

        pay = int.Parse(Console.ReadLine());

        Console.WriteLine("消費金額"+pay);

        if(pay>1000)

        {

        pay=pay*0.8;

        Console.WriteLine("折扣價為"+pay);      

    }

        else

        {

        Console.WriteLine("金額未達折扣價");

        }

    }

}

​