C++拷贝构造函数以及运算符重载例子 （Linux 下编(2)

temp.real = real + other.real;
        temp.image = image + other.image;
        cout<<"----- operator x + y start -----.\n";
        cout<<"this->real: "<<real<<", this->image: "<<image<<" .\n";
        cout<<"other.real: "<<other.real<<", other.image: "<<other.image<<" .\n";
        cout<<"temp.real: "<<temp.real<<", temp.image: "<<temp.image<<" .\n";
        cout<<"----- operator x + y end -----.\n";
        return temp;
}

//重载减法运算符（二元）
COMPLEX COMPLEX::operator -(const COMPLEX &other)
{
        COMPLEX temp;

        temp.real = real - other.real;
        temp.image = image - other.image;
        cout<<"----- operator x - y start -----.\n";
        cout<<"this->real: "<<real<<", this->image: "<<image<<" .\n";
        cout<<"other.real: "<<other.real<<", other.image: "<<other.image<<" .\n";
        cout<<"temp.real: "<<temp.real<<", temp.image: "<<temp.image<<" .\n";
        cout<<"----- operator x - y end -----.\n";
        return temp;
}

//重载求负运算符（一元）
COMPLEX COMPLEX::operator -()
{
        COMPLEX temp;

temp.real = -real;
        temp.image = -image;
        cout<<"----- operator -x start -----.\n";
        cout<<"this->real: "<<real<<", this->image: "<<image<<" .\n";
        cout<<"temp.real: "<<temp.real<<", temp.image: "<<temp.image<<" .\n";
        cout<<"----- operator -x end -----.\n";
        return temp;
}

//重载赋值运算符（二元）
COMPLEX COMPLEX::operator =(const COMPLEX &other)
{
        cout<<"----- operator x = y start -----.\n";
        cout<<"other.real: "<<other.real<<", other.image: "<<other.image<<" .\n";
        cout<<"this->real: "<<real<<", this->image: "<<image<<" .\n";
        real = other.real;
        image = other.image;
        cout<<"other.real: "<<other.real<<", other.image: "<<other.image<<" .\n";
        cout<<"this->real: "<<real<<", this->image: "<<image<<" .\n";
        cout<<"----- operator x = y end -----.\n";
        return *this;               //这里返回的是当前对象，*this表示取指向当前对象指针的值，也就是当前对象
                                         //实际上这里返回的是一个当前对象的副本，该对象副本通过拷贝构造函数创建
}
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演示复数类 COMPLEX 的用法文件：main.cpp
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#include <iostream>
#include "complex.h"

using namespace std;

int main()
{
        cout<<"COMPLEX c1(1,2);\n";
        COMPLEX c1(1,2);                    //定义一个值为 1+2i 的复数
        cout<<"COMPLEX c2(2);\n";
        COMPLEX c2(2);                       //定义一个值为 2 的复数
        cout<<"COMPLEX c3(c1);\n";
        COMPLEX c3(c1);                     //用拷贝构造函数创建一个值与c1相同的新复数c3