C++ 实现复数的加减乘除

#include <iostream>
using namespace std;
class Complex             //定义Complex类
{public:
Complex(){real=0;imag=0;}                //定义构造函数
Complex(double r,double i){real=r;imag=i;}    //构造函数重载
Complex operator+(Complex &c2);           //声明复数相加函数
Complex operator-(Complex &c2);           //声明复数相减函数
Complex operator*(Complex &c2);          //声明复数相乘函数
Complex operator/(Complex &c2);          //声明复数相除函数
void display();                                      //声明输出函数
private:
double real;           //实部
double imag;         //虚部
};
Complex Complex::operator+(Complex &c2)      //定义复数相加函数
{Complex c;
c.real=real+c2.real;
c.imag=imag+c2.imag;
return c;}
Complex Complex::operator-(Complex &c2)       //定义复数相减函数
{Complex c;
c.real=real-c2.real;
c.imag=imag-c2.imag;
return c;}
Complex Complex::operator*(Complex &c2)             //定义复数相乘函数
{Complex c;
c.real=real*c2.real-imag*c2.imag;
c.imag=imag*c2.real+real*c2.imag;
return c;}
Complex Complex::operator/(Complex &c2)               //定义复数相除函数
{Complex c;
c.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.i
mag*c2.imag);
c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.i
mag*c2.imag);
return c;}
void Complex::display()
{cout<<"("<<real<<","<<imag<<"i)"<<endl;}
int main()
{Complex c1(3,4),c2(5,-10),c3;          //定义三个复数对象
c3=c1+c2;      // 调用复数相加函数
cout<<"c1+c2=";
c3.display();
c3=c1-c2;      // 调用复数相减函数
cout<<"c1-c2=";
c3.display();
c3=c1*c2;         // 调用复数相乘函数
cout<<"c1*c2=";
c3.display();
c3=c1/c2;          // 调用复数相除函数
cout<<"c1/c2=";
c3.display();
return 0;
}