运算符重载（复数类（Complex））

环境：win10，vs2013
复数运算法则
运算后结果仍然是一个复数

1.加法两个复数的和依然是复数，它的实部是原来两个复数实部的和，它的虚部是原来两个复数虚部的和z1=a+bi,z2=c+di它们的和是：(a+bi)+(c+di)=(a+c)+(b+d)i2.减法z1=a+bi,z2=c+di它们的差是：(a+bi)-(c+di)=(a-c)+(b-d)i3.乘法z1=a+bi,z2=c+di它们的积是：(a+bi)(c+di）=(ac-bd)+(bc+ad)i4.除法z1=a+bi,z2=c+di它们的商是：(a+bi)/(c+di）=((ac+bd)+(bc-ad)i)/(c^2+d^2)

Complex.h

using namespace std;#include<stdlib.h>#include<iostream>class Complex{public :    Complex();//默认构造函数    Complex(double real, double image);//构造函数（构造对象）    //赋值操作符重载需要注意：1.自己给自己赋值；2.返回值是引用的形式：3.返回当前对象；4.参数，传引用    Complex& operator=(const Complex&d);//赋值操作符重载    bool operator==(const Complex&c);//重载==    bool operator!=(const Complex&c);//重载！=    Complex(const Complex&c);//拷贝构造函数    Complex operator+(const Complex&c);//重载+    Complex operator*(const Complex&c);//重载*    Complex operator-(const Complex&c);//重载-    Complex operator/(const Complex&c);//重载/    Complex operator+=(const Complex&c);//重载+=    Complex operator-=(const Complex&c);//重载-=    Complex operator*=(const Complex&c);//重载*=    Complex operator/=(const Complex&c);//重载/=    Complex operator++(int c);//后置++    Complex& operator++();//前置++    Complex operator--(int c);//后置--    Complex& operator--();//前置--    void Print();private:    double _real;    double _image;    friend ostream&operator<<(ostream&_cout, Complex&c);//输出运算符重载};

Complex.cpp

#include"Complex.h"void Complex::Print(){    cout << _real << "+" << _image << "i" << endl;}ostream&operator<<(ostream&_cout, Complex&c)//输出运算符重载{    _cout << c._real << "+" <<c._image << "i";    return _cout;}Complex::Complex()//默认构造函数{    _real = 1.3;    _image = 1.4;}Complex::Complex(double real=0.1, double image=0.2):_real(real), _image(image){}Complex::Complex(const Complex&c)//拷贝构造函数{    _real = c._real;    _image = c._image;}Complex& Complex::operator=(const Complex&c)//赋值运算符重载{    if (*this != c)    {        _real = c._real;        _image = c._image;    }    return *this;}bool Complex::operator==(const Complex&c)//重载=={    if ((_real == c._real) && (_image = c._image))        return true;    return false;}bool Complex::operator!=(const Complex&c)//重载！={    return!(*this == c);}Complex Complex::operator+(const Complex&c)//重载+{    return Complex(_real + c._real, _image + c._image);}Complex Complex::operator*(const Complex&c)//重载*{    return Complex(  ( (_real*c._real) - (_image*c._image)), ((_image*c._real) + (_real*c._image) )  );}Complex Complex::operator-(const Complex&c)//重载—{    return Complex(_real - c._real, _image - c._image);}Complex Complex::operator+=(const Complex&c)//重载+={    _real = _real+c._real;    _image = _image+c._image;    return *this;}Complex Complex::operator-=(const Complex&c)//重载-={    _real = _real - c._real;    _image = _image -c._image;    return *this;}Complex Complex::operator++(int c)//后置++{    Complex temp(*this);    _real += 1;    _image += 1;    return temp;}Complex& Complex::operator++()//前置++{    _real += 1;    _image += 1;    return *this;}Complex Complex::operator--(int c)//后置——{    Complex temp(*this);    _real -= 1;    _image -= 1;    return temp;}Complex& Complex::operator--()//前置--{    _real -= 1;    _image -= 1;    return *this;}

test.cpp

#include"Complex.h"int main(){    Complex c1(1.1, 2.2);    c1.Print();    Complex c2(3.3, 4.4);    c2.Print();    Complex c3;    c3.Print();    c3 = c2;    cout << c3 << endl;    cout << (c3 != c1) << endl;    cout << (c3 == c1) << endl;    cout << c1 + c2 << endl;    cout << c1 - c2 << endl;    cout << c1 * c2 << endl;    cout << endl;    Complex c4(5.5, 6.6);    c4.Print();    cout << (c1 += c4) << endl;    cout << (c1 -= c4) << endl;    cout << endl;    cout << c1++ << endl;    cout << c2-- << endl;    cout << ++c3 << endl;    cout << --c4 << endl;    system("pause");    return 0;}

运行结果：