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#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);    friend ostream&operator<<(ostream&,Complex&);    friend istream&operator>>(istream&,Complex&);    Complex operator-();    void display();private:    double real;    double imag;};ostream&operator<<(ostream& output,Complex&c){   output<<"("<<c.real<<"+"<<c.imag<<"i";   return output;}istream&operator>>(istream&input,Complex&c){   cout<<"input real and imag part of Complex number:";   input>>c.real>>c.imag;   return input;}Complex Complex::operator-(){   Complex c;   c.real=-real;   c.imag=-imag;   return c;}//下面定义成员函数void Complex:: display(){    cout<<"("<<real<<","<<imag<<"i)"<<endl;}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;//复数相除：(a+bi)/(c+di)=(ac+bd)/(c^2+d^2) +(bc-ad)/(c^2+d^2)i    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;}//下面定义用于测试的main()函数int main(){    Complex c1(3,4),c2(5,-10),c3;    cout<<"c1=";    c1.display();    cout<<"c2=";    c2.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();    c3=c1/c2;    cout<<"c1/c2=";    c3.display();    c3=-c1;    cout<<"-c1=";    c3.display();    return 0;}
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