c++复数类Complex的编写

c++复数类Complex的编写。

复数：由实部和虚部组成。

主要实现几个运算符的重载：=/==/+/-/+=/-+/前置++/前置–/后置++/后置–

主要实现代码如下：

头文件Complex.h 函数声明和类定义

#include
#pragma once

class Complex
{
public:
    Complex(double real=0.0,double image=0.0);//构造
    ~Complex();//析构
    Complex(Complex& c1);//拷贝构造

    //运算符重载
    Complex &operator=(const Complex &d); //赋值函数
    bool operator==(const Complex &d);//判断相等
    Complex operator+(const Complex &d);//两个复数相加
    Complex &operator+=(const Complex &d);//复数+=d
    Complex operator-(const Complex &d);//两复数相减
    Complex &operator-=(const Complex &d);//复数-=
    Complex operator++(); //前置++ 
    Complex operator++(int);//后置++
    Complex operator--();//前置--
    Complex operator--(int);//后置--
    void Display();//显示复数的实部和虚部
private:
    double _real;
    double _image;
};

源文件 Complex.cpp 类的成员函数实现：

#include"Complex.h"

//构造函数
Complex::Complex(double real,double image)
{
    _real=real;
    _image=image;
}

//拷贝构造函数
Complex::Complex(Complex & c1)
   :_real(c1._real),
    _image(c1._image)
{

}
//析构函数
Complex::~Complex()
{

}

Complex& Complex::operator=(const Complex &d)//赋值运算符的重载
{
    this->_real=d._real;
    this->_image=d._image;
    return *this;
}

bool Complex::operator==(const Complex &d)//判断相等
{
    return this->_real ==d._real&&this->_image==d._image;
}

Complex Complex ::operator+(const Complex &d)//两个复数相加
{
  Complex tmp;
  tmp._image=this->_image+d._image;
  tmp._real=this->_real+d._real;
  return tmp;
}    

Complex& Complex::operator+=(const Complex &d)//复数+=d
{
   this->_image+=d._image;
   this->_real+=d._real;
   return *this;
}

Complex Complex::operator-(const Complex &d)//两个复数相减
{
    Complex tmp;
    tmp._image=this->_image-d._image;
    tmp._real=this->_real-d._real;
    return tmp;
}

Complex& Complex::operator-=(const Complex &d)//复数-=d
{        
    this->_image-=d._image;
    this->_real-=d._real;
    return *this;
}

Complex Complex::operator++()//前置++
{
    this->_real++;
    this->_image++;
    return *this;
}

Complex Complex::operator++(int)//后置++
{
    Complex tmp;
    tmp=*this;
    this->_image++;
    this->_real++;
    return tmp;
}

Complex Complex::operator--()//前置--
{
    this->_image--;
    this->_real--;
    return *this;
}

Complex Complex::operator--(int)//后置--
{
    Complex tmp=*this;
    this->_image--;
    this->_real--;
    return tmp;
}

void Complex::Display()//输出复数的实部和虚部
{
    std::cout<<"real:"<<_real<<std::endl;
    std::cout<<"image:"<<_image<<std::endl;
}

测试部分在text.cpp中

#include"Complex.h"
#include
#include
using namespace std;


void Test1()  //+=  -=  + - 测试  
{  
    Complex c1(1.0,2.0), c2(2.0,1.0);  
    Complex c3=c1 -= c2;  
    //Complex c3=c1 += c2;  
    //Complex c3 = c1 + c2;  
    //Complex c3=c1 - c2;  
    c1.Display();  
    c3.Display();  
}  
void Test2()  // ++测试  
{  
    Complex c1(1.0, 5.0);  
    Complex c2=c1++;  
    Complex c3 = ++c1;  
    c1.Display();  
    c2.Display();  
    c3.Display();  
}  


void Test3()  
{  
    Complex c1(1.0, 5.0);  
    Complex c2 = c1--;  
    Complex c3 = --c1;  
    c1.Display();  
    c2.Display();  
    c3.Display();  
}  
int main()
{
    Test3();
    system("pause");
    return 0;
}

这篇只实现了几种简单的复数类，仅供参考。