C#

struct_Operator_Overloading.cs

using System;

namespace 运算符重载
{
    /*----------< 结构体:struct_Operator_Overloading >-----------
     * 运算符重载:
    ----------------------------------------------------------------*/
    public struct struct_Operator_Overloading
    {
        public int nReal { get; set; }              // 实数部分
        public int nImaginary { get; set; }       // 虚数部分
        /*----------------------< 带参数构造函数 >------------------------
         *  1.带参数的构造函数(必须加上【:this()】否则会有如下错误提示:
         *    错误 CS0188: 在给“this”对象的所有字段赋值之前,无法使用该对
         *    象.
        ---------------------------------------------------------------------*/
        public struct_Operator_Overloading(int real, int imaginary) : this()
        {
            nReal = real;
            nImaginary = imaginary;
        }
        /*-------------------< 重载运算符【 + 】>---------------------
         * 重载运算符【 + 】:
         *      1.形参a : 第一个操作数, 必须为struct_Operation_Overrloading类型
         *      2.形参b : 第二个操作数. 必须为struct_Operation_Overrloading类型
         *      3.返回值: 必须为 struct_Operation_Overrloading 类型
         *      4.修饰词: 必须加 public 
         *      5.所有运算符重载的方法都应为静态方法: static 
        ----------------------------------------------------------------*/
        public static struct_Operator_Overloading operator +(struct_Operator_Overloading a, struct_Operator_Overloading b)
        {
            struct_Operator_Overloading result = new struct_Operator_Overloading();
            result.nReal = a.nReal + b.nReal;
            result.nImaginary = a.nImaginary + b.nImaginary;
            return result;                      // 返回结果
        }

        // 重写ToString()方法
        public override string ToString()
        {
            return string.Format("{0}+{1}", nReal, nImaginary);
        }

    }

}

Program.cs

using System;

namespace 运算符重载
{
    class Program
    {
        static void Main(string[] args)
        {
            struct_Operator_Overloading a = new struct_Operator_Overloading(10, 20);
            struct_Operator_Overloading b = new struct_Operator_Overloading(30, 40);
            struct_Operator_Overloading sum = new struct_Operator_Overloading();
            // 利用重载的【+】来实现加法运算: 
            //  即: a与b的形参1与形参1相加; 形参2与形参2相加
            sum = a + b;    

            Console.WriteLine(" sum.nReal = {0}
 sum.Imaginary = {1}", sum.nReal, sum.nImaginary);
            //测试 : 重写的ToString()方法
            Console.WriteLine(" sum.ToSting();{0} ", sum.ToString());

            Console.ReadLine();
        }
    }
}