派生类求两点间的距离、矩形的周长和面积

待我称王封你为后i 2022-07-26 05:16 358阅读 0赞

问题及代码：

平面直角坐标系上的一点类CPoint作为基类，派生出描述一条直线的类Cline，再派生出一个矩形类CRect。

要求成员函数能求出两点间的距离、矩形的周长和面积等。

using System;
    using System.Collections.Generic;
    using System.Text;
    
    namespace ConsoleApplication1
    {
        class CPoint
        {
            private double x;
            private double y;
            public CPoint() { }
            public CPoint(double x, double y) { this.x = x; this.y = y; }
            public static double Distance(CPoint n1, CPoint n2)
            {
                return Math.Abs(Math.Pow(n1.x - n2.x, 2) + Math.Pow(n1.y - n2.y, 2));
            }
    
        }
        class Cline : CPoint
        {
            private CPoint n1;
            private CPoint n2;
            public static double operator *(Cline a, Cline b)
            {
                return CPoint.Distance(a.n1, a.n2) * CPoint.Distance(a.n1, a.n2);
            }
            public static double operator +(Cline a, Cline b)
            {
                return CPoint.Distance(a.n1, a.n2) + CPoint.Distance(a.n1, a.n2);
            }
            public Cline() { }
            public Cline(CPoint n1, CPoint n2) { this.n1 = n1; this.n2 = n2; }
    
        }
        class CRect : Cline
        {
            Cline a;
            Cline b;
            public CRect() { }
            public CRect(Cline a, Cline b) { this.a = a; this.b = b; }
            public double Perimeter()
            {
                return (a + b) * 2;
            }
            public double Area()
            {
                return a * b;
            }
        }
    
        class Program
        {
            static void Main(string[] args)
            {
                Console.Write("x1=");
                int x1 = int.Parse(Console.ReadLine());
                Console.Write("y1=");
                int y1 = int.Parse(Console.ReadLine());
                Console.Write("x2=");
                int x2 = int.Parse(Console.ReadLine());
                Console.Write("y2=");
                int y2 = int.Parse(Console.ReadLine());
                CPoint n1 = new CPoint(x1, y1);
                CPoint n2 = new CPoint(x2, y2);
                Console.WriteLine("两点之间的距离为:{0}", CPoint.Distance(n1, n2));
    
                Console.Write("x1=");
                x1 = int.Parse(Console.ReadLine());
                Console.Write("y1=");
                y1 = int.Parse(Console.ReadLine());
                Console.Write("x2=");
                x2 = int.Parse(Console.ReadLine());
                Console.Write("y2=");
                y2 = int.Parse(Console.ReadLine());
                CPoint n3 = new CPoint(x1, y1);
                CPoint n4 = new CPoint(x2, y2);
                Cline a = new Cline(n1, n2);
                Cline b = new Cline(n2, n4);
                CRect rect = new CRect(a, b);
                Console.WriteLine("由点（{0}，{1}）和点（{2}，{3}）组成的", x1,y1,x2,y2);
                Console.WriteLine("矩形的长为:{0}", CPoint.Distance(n1, n2));
                Console.WriteLine("矩形的宽为:{0}", CPoint.Distance(n2, n4));
                Console.WriteLine("矩形的面积为:{0}", rect.Area());
                Console.WriteLine("矩形的周长为:{0}", rect.Perimeter());
                Console.ReadKey();
            }
        }
    }

运行结果：

![Center][]

[Center]: /images/20220724/83192c281e374f7ea4d104f99791d863.png