C++编程：定义一个复数类Complex，重载运算符“+”,“-”,“*”,“/”,使之能用于复数的加、减、乘、除。运算符重载作为Complex的类的成员函数,编程序,求两个复数的和,差,积,商。

以下是此题的【c++源代码】
#include <iostream>
using namespace std;
class Complex
 {public:
   Complex(){real=0;imag=0;}
   Complex(double r,double i){real=r;imag=i;}
   Complex operator+(Complex &c2);
   Complex operator-(Complex &c2);
   Complex operator*(Complex &c2);
   Complex operator/(Complex &c2);
   void display();
  private:
   double real;
   double imag;
 };
 
Complex Complex::operator+(Complex &c2)
{Complex c;
 c.real=real+c2.real;
 c.imag=imag+c2.imag;
 return c;}
 
Complex Complex::operator-(Complex &c2)
{Complex c;
 c.real=real-c2.real;
 c.imag=imag-c2.imag;
 return c;}

Complex Complex::operator*(Complex &c2)
{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)
{Complex c;
 c.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
 c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
 return c;}

void Complex::display()
{cout<<"("<<real<<","<<imag<<"i)"<<endl;}

int main()
{Complex c1(3,4),c2(5,-10),c3;
 c3=c1+c2;
 cout<<"c1+c2=";
 c3.display();
 c3=c1-c2;
 cout<<"c1-c2=";
 c3.display();
 c3=c1*c2;
 cout<<"c1*c2=";
 c3.display();
 c3=c1/c2;
 cout<<"c1/c2=";
 c3.display();
 return 0;
}

来源：c++程序设计第三版谭浩强课后答案

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