自定义显式类型转换－－explicit

最新推荐文章于 2025-05-02 11:22:13 发布

最新推荐文章于 2025-05-02 11:22:13 发布 · 77 阅读

文章标签：

#Linq #J#

本文介绍了一个使用C#实现的矩形和正方形结构体，并演示了如何通过显式转换操作符在这两种结构体间进行转换。此外，还展示了如何将正方形结构体转换为整数。

语法：public static explicit operator 目的类型(源类型r)

using System;

using System.Collections;

using System.Linq;

using System.Text;

using System.Collections.Generic;

using System.Runtime.Serialization;



namespace TestCS

{



    public struct Rectangle

    {

        public int Width, Height;

        public Rectangle(int width, int height)

        {

            this.Width = width;

            this.Height = height;

        }



        public void Draw()

        {

            for (int i = 0; i < Width; i++)

            {

                for (int j = 0; j < Height; j++)

                {

                    Console.Write("*");

                }

            }



            Console.WriteLine();

        }



        public override string ToString()

        {

            return string.Format("Rectangle, Width is {0}  Height is {1}", Width, Height);

        }

    }





    public struct Square

    {

        public int Length;



        public Square(int length)

        {

            Length = length;

        }



        public void Draw()

        {

            for (int i = 0; i < Length; i++)

            {

                for (int j = 0; j < Length; j++)

                {

                    Console.Write("*");



                }

            }



            Console.WriteLine();

        }



        public override string ToString()

        {

            return string.Format("Sqare :length is{0} ", Length);

        }





        public static explicit operator Square(Rectangle r)

        {

            Square s = new Square(r.Height);

            return s;

        }



        public static explicit operator Square(int r)

        {

            Square s = new Square(r);

            return s;

        }



        public static explicit operator int(Square s)

        {

            return s.Length;

        }

    }



    class Program

    {



        static void Main(string[] args)

        {

            Console.WriteLine(" Rectangle");

            Rectangle r = new Rectangle(4, 3);

            Console.WriteLine(r.ToString());

            r.Draw();



            Console.WriteLine("From Rectangle");

            Square s = (Square)r;

            Console.WriteLine(s.ToString());

            s.Draw();



            Console.WriteLine("From int");

            Square s2 = (Square)3;

            Console.WriteLine(s2.ToString());

            s2.Draw();



            Console.WriteLine("to int");

            int i = (int)s2;

            Console.WriteLine(i.ToString());

        }

    }





  

}