ch02 StructTest-优快云博客

本文通过具体的C#代码示例介绍了struct作为值类型和类作为引用类型的使用区别。通过Rectangle结构体实例展示了值类型在赋值时如何进行完全复制。

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struct 是值类型，类是引用类型。


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace StructTest
{   // 定义 point 结构
    public struct point
    {
        public int x;
        public int y;
    }
    // 定义 Rectangle 结构
    public struct Rectangle
    {

        public point topleft;
        public point topright;
        public point bottomleft;
        public point bottomright;
        public bool used;
    }
    class Program
    {
        static void Main(string[] args)
        {
            // 初始化 Rectangle 结构变量
            Rectangle rec, rc;
            rec.topleft.x = 200;
            rec.topleft.y = 200;
            rec.topright.x = 300;
            rec.topright.y = 200;
            rec.bottomleft.x = 200;
            rec.bottomleft.y = 300;
            rec.bottomright.x = 300;
            rec.bottomright.y = 300;
            rec.used = true;
            rc = rec;

            Console.WriteLine("rc.topleft.x={0}", rc.topleft.x);

            Console.WriteLine("rc.topleft.y={0}", rc.topleft.y);

            Console.WriteLine("rc.topright.x={0}", rc.topright.x);

            Console.WriteLine("rc.topright.y={0}", rc.topright.y);

            Console.WriteLine("rc.bottomleft.x={0}", rc.bottomleft.x);

            Console.WriteLine("rc.bottomleft.y={0}", rc.bottomleft.y);

            Console.WriteLine("rc.bottomright.x={0}", rc.bottomright.x);

            Console.WriteLine("rc.bottomright.y={0}", rc.bottomright.y);

            Console.WriteLine("rc.used={0}", rc.used);

            Console.ReadKey();

        }
    }
}