c#中的运算符重载

来源：互联网发布：数据挖掘算法和原理编辑：程序博客网时间：2024/05/21 21:50
using System;
using System.Collections.Generic;
using System.Text;
namespace CountStrDemo
{
    class 比较运算符重载
    {
        public static void Main(string[] args)
        { 
            // 比较预算符有6个,3对 分别是: 
            // ==  != 
            // >  < 
            // >= <= 
            //成对重载,例如,重载了 == 则必须重载 != 反回类型必须是bool 
        }
        class MyVectorForEq
        {
            public int x;
            public int y;
            public MyVectorForEq( int x , int y )
            {
                this.x = x;
                this.y = y;
            }
            //重载==运算符 同时必须成对重载 != 
            public static bool operator == ( MyVectorForEq lobj , MyVectorForEq robj )
            {
                //这里只是做了成员值的比较,ms推荐重写Equals方法与配合hash来进行对象内容的比较 
                if (lobj.x == robj.x && lobj.y == robj.y)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
            public static bool operator !=( MyVectorForEq lobj , MyVectorForEq robj)
            {
                if (lobj.x == robj.x && lobj.y == robj.y)
                {
                    return false;
                }
                else
                {
                    return true;
                }
            }
        }
    }
}
using System;
using System.Collections.Generic;
using System.Text;
namespace CountStrDemo
{
    class 运算浮重载
    {
        public static void Main(string[] args)
        {
            Vector vec1 = new Vector( 5 , 6 , 7 );
            Vector vec2 = new Vector( 2 , 2 , 2 );
            Vector revec = vec1 + vec2;
            Console.WriteLine( "x={0} y={1} z={2}" , revec.x , revec.y , revec.z );
            Console.Read();
        }
    }
    class Vector
    {
        public int x;
        public int y;
        public int z;
        public Vector( int x , int y  , int z )
        {
            this.x = x;
            this.y = y;
            this.z = z;
        }
        public Vector(Vector vec)
        {
            this.x = vec.x;
            this.y = vec.y;
            this.z = vec.z;
        }
        //定义重载 , 和方法类似,不过必须是public static ...可以记做没有方法名,呵呵operator + 指重载+号运算 
        public static Vector operator + ( Vector lvec , Vector rvec )
        {
            Vector revec = new Vector( lvec );
            revec.x += rvec.x;
            revec.y += rvec.y;
            revec.z += rvec.z;
            return revec;
        }
    }
}
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