2015年第九周项目一：复数类中的运算符重载（续）(2)

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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+(const Complex &c2);    Complex operator-(const Complex &c2);    Complex operator*(const Complex &c2);    Complex operator/(const Complex &c2);    Complex operator-();    friend ostream& operator<<(ostream&,Complex&);    friend istream& operator>>(istream&,Complex&);    void display();private:    double real;    double imag;};//下面定义成员函数//复数相加： (a+bi)+(c+di)=(a+c)+(b+d)i.ostream& operator<<(ostream&output,Complex&c){    output<<"("<<c.real<<","<<c.imag<<"i"<<")";    return output;}istream& operator>>(istream&input,Complex&c){    input>>c.real>>c.imag;    return input;}Complex Complex::operator-(){    real=-real;    imag=-imag;    return *this;}Complex Complex::operator+(const Complex &c2){    Complex c;    c.real=real+c2.real;    c.imag=imag+c2.imag;    return c;}//复数相减：(a+bi)-(c+di)=(a-c)+(b-d)i.Complex Complex::operator-(const Complex &c2){    Complex c;    c.real=real-c2.real;    c.imag=imag-c2.imag;    return c;}//复数相乘：(a+bi)(c+di)=(ac－bd)+(bc+ad)i.Complex Complex::operator*(const Complex &c2){    Complex c;    c.real=real*c2.real-imag*c2.imag;    c.imag=imag*c2.real+real*c2.imag;    return c;}//复数相除：(a+bi)/(c+di)=(ac+bd)/(c^2+d^2) +(bc-ad)/(c^2+d^2)iComplex Complex::operator/(const 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;}//下面定义用于测试的main()函数int main(){    Complex c1(3,4),c2(5,-10),c3,c4;    cout<<c1<<'\n';    cout<<c2<<'\n';    cout<<c3<<'\n';    c1=-c1;    c1.display();    cout<<"c2=";    cout<<c2<<'\n';    c3=c1+c2;    cout<<"c1+c2=";    cout<<c3<<'\n';    c3=c1-c2;    cout<<"c1-c2=";    cout<<c3<<'\n';    c3=c1*c2;    cout<<"c1*c2=";    cout<<c3<<'\n';    c3=c1/c2;    cout<<"c1/c2=";    cout<<c3<<'\n';    cin>>c4;    cout<<c4;    return 0;}
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