求c#大佬 救救孩子

Question

1、一家电影院售票，对于不同类型的客户有不同的打折力度。（1）对于学生可享八折优惠

（2）对于年龄在10岁以下的儿童可享受每张票减10元优惠（票价总额必须大于20元）

（3）VIP用户可以半价购票，同时还可以积分。

请分别用虚函数、抽象类、接口三种方法来实现上述题目要求。

 

提示：父类Discount，其中有Calculate函数负责计算票价，输入参数是票价，返回参数是根据用户类型打折后的票价。子类StudentDiscount，ChildrenDiscount，VIPDiscount。在主函数中通过调用Discount.Calculate来计算打折后的票价。

Answer 1

帮你写了，帮助到你可以采纳支持吗，谢谢

using System;
namespace ConsoleApp1
{
    /*//虚函数
    public class Discount { public virtual double Calculate(double price) { return -1; } }
    public class StudentDiscount : Discount { public override double Calculate(double price) { return Math.Round(price * 0.8, 2); } }
    public class ChildrenDiscoun : Discount { public override double Calculate(double price) { return Math.Max(price - 10, 20); } }
    public class VIPDiscount : Discount { public override double Calculate(double price) { return Math.Round(price / 2, 2); } }
    */

    //抽象类
    /*public abstract class Discount { public abstract double Calculate(double price); }
    public class StudentDiscount : Discount { public override double Calculate(double price) { return Math.Round(price * 0.8, 2); } }
    public class ChildrenDiscoun : Discount { public override double Calculate(double price) { return Math.Max(price - 10, 20); } }
    public class VIPDiscount : Discount { public override double Calculate(double price) { return Math.Round(price / 2, 2); } }*/

    //接口
    public interface Discount { double Calculate(double price); }
    public class StudentDiscount : Discount { public double Calculate(double price) { return Math.Round(price * 0.8, 2); } }
    public class ChildrenDiscoun : Discount { public double Calculate(double price) { return Math.Max(price - 10, 20); } }
    public class VIPDiscount : Discount { public double Calculate(double price) { return Math.Round(price / 2, 2); } }

    class Program
    {
        static void Main(string[] args)
        {
            Discount d = new StudentDiscount();
            Console.WriteLine(d.Calculate(55.88));

            d = new ChildrenDiscoun();
            Console.WriteLine(d.Calculate(55));
            Console.WriteLine(d.Calculate(25));

            d = new VIPDiscount();
            Console.WriteLine(d.Calculate(55.88));
            Console.ReadKey();
        }
        
    }
}