第九周 项目一--复数类中的运算符重载（续）

问题及代码：

/** Copyright (c) 2015,烟台大学计算机学院* All rights reserved.* 文件名称：test.cpp* 作者：吴胜男* 完成日期：2015年4月29日* 版本号：v1.0** 问题描述：在复数类中的运算符重载基础上（1）再定义一目运算符 -，-c相当于0-c。（2）定义Complex类中的<<和>>运算符的重载，实现输入和输出，改造原程序中对运算结果显示方式，使程序读起来更自然。* 输入描述：略* 程序输出：略*/#include<iostream>using namespace std;class Complex{public:    Complex(){real=0;imag=0;}    Complex(double r,double i){real=r; imag=i;}    friend Complex operator+(const Complex &c1,const Complex &c2);    friend Complex operator+(const double d,const Complex &c2);    friend Complex operator+(const Complex &c1,const double d);    friend Complex operator-(const Complex &c1,const Complex &c2);    friend Complex operator-(const double d,const Complex &c2);    friend Complex operator-(const Complex &c1,const double d);    friend Complex operator*(const Complex &c1,const Complex &c2);    friend Complex operator*(const double d,const Complex &c2);    friend Complex operator*(const Complex &c1,const double d);    friend Complex operator/(const Complex &c1,const Complex &c2);    friend Complex operator/(const double d,const Complex &c2);    friend Complex operator/(const Complex &c1,const double d);    friend ostream&operator<<(ostream&,Complex&);    friend istream&operator>>(istream&,Complex&);    Complex operator-();private:    double real;    double imag;};//下面定义成员函数ostream&operator<<(ostream&output,Complex&c){    output<<"("<<c.real;    if(c.imag>=0)output<<"+";    output<<c.imag<<"i)"<<endl;    return output;}istream&operator>>(istream&input,Complex&c){     input>>c.real>>c.imag;     return input;}Complex Complex::operator-(){    Complex c;    c.real=-real;    c.imag=-imag;    return c;}Complex operator+(const Complex &c1,const Complex &c2){    Complex c;    c.real=c1.real+c2.real;    c.imag=c1.imag+c2.imag;    return c;}Complex operator+(const double d,const Complex &c2){    Complex c;    c.real=d+c2.real;    c.imag=c2.imag;    return c;}Complex operator+(const Complex &c1,const double d){    Complex c;    c.real=d+c1.real;    c.imag=c1.imag;    return c;}Complex operator-(const Complex &c1,const Complex &c2){    Complex c;    c.real=c1.real-c2.real;    c.imag=c1.imag-c2.imag;    return c;}Complex operator-(const double d,const Complex &c2){    Complex c;    c.real=d-c2.real;    c.imag=-c2.imag;    return c;}Complex operator-(const Complex &c1,const double d){    Complex c;    c.real=c1.real-d;    c.imag=c1.imag;    return c;}Complex operator*(const Complex &c1,const Complex &c2){    Complex c;    c.real=c1.real*c2.real-c1.imag*c2.imag;    c.imag=c1.imag*c2.real+c1.real*c2.imag;    return c;}Complex operator*(const double d,const Complex &c2){    Complex c;    c.real=d*c2.real;    c.imag=d*c2.imag;    return c;}Complex operator*(const Complex &c1,const double d){    Complex c;    c.real=d*c1.real;    c.imag=d*c1.imag;    return c;}Complex operator/(const Complex &c1,const Complex &c2){    Complex c;    c.real=(c1.real*c2.real+c1.imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);    c.imag=(c1.imag*c2.real-c1.real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);    return c;}Complex operator/(const double d,const Complex &c2){    Complex c;    c.real=(d*c2.real)/(c2.real*c2.real+c2.imag*c2.imag);    c.imag=(-d*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);    return c;}Complex operator/(const Complex &c1,const double d){    Complex c;    c.real=(c1.real*d)/(d*d);    c.imag=(c1.imag*d)/(d*d);    return c;}//下面定义用于测试的main()函数int main(){    Complex c1(3,4),c2(5,-10),c3,c4;    cout<<"输入c4的实部和虚部：";    cin>>c4;    cout<<"c4="<<c4;    cout<<"c1=";    cout<<c1;    cout<<"c2=";    cout<<c2;    c3=c1+c2;    cout<<"c1+c2=";    cout<<c3;    c3=c1-c2;    cout<<"c1-c2=";    cout<<c3;    c3=c1*c2;    cout<<"c1*c2=";    cout<<c3;    c3=c1/c2;    cout<<"c1/c2=";    cout<<c3;    c3=c1+2;    cout<<"c1+2=";    cout<<c3;    c3=3+c1;    cout<<"3+c1=";    cout<<c3;    c3=c2-2;    cout<<"c2-2=";    cout<<c3;    c3=1-c2;    cout<<"1-c2=";    cout<<c3;    c3=c1*3;    cout<<"c1*3=";    cout<<c3;    c3=5*c1;    cout<<"5*c1=";    cout<<c3;    c3=c2/5;    cout<<"c2/5=";    cout<<c3;    c3=6/c1;    cout<<"6/c1=";    cout<<c3;    c3=-c1;    cout<<"-c3="<<c3;    return 0;}

运行结果：