第9周项目1——复数类中的运算符重载（续）

/* * Copyright (c) 2015, 烟台大学计算机学院 * All rights reserved. * 文件名称：test.cpp * 作    者：王元阳 * 完成日期：2015 年 5 月 13 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： *程序输出：编写的程序 */#include <iostream>using namespace std;class Complex{public:    Complex()    {        real=0;        imag=0;    }    Complex(double r,double i)    {        real=r;        imag=i;    }    Complex operator-();    friend istream& operator >> (istream& input,Complex& c);    friend ostream& operator << (ostream& output,const Complex& c);    friend Complex operator+(Complex &c1,Complex &c2);    friend Complex operator+(double d1,Complex &c2);    friend Complex operator+(Complex &c1,double d2);    friend Complex operator-(Complex &c1,Complex &c2);    friend Complex operator-(double d1,Complex &c2);    friend Complex operator-(Complex &c1,double d2);    friend Complex operator*(Complex &c1,Complex &c2);    friend Complex operator*(double d1,Complex &c2);    friend Complex operator*(Complex &c1,double d2);    friend Complex operator/(Complex &c1,Complex&c2);    friend Complex operator/(double d1,Complex &c2);    friend Complex operator/(Complex &c1,double d2);private:    double real;    double imag;};//下面定义成员函数istream& operator >> (istream& input,Complex& c){    int a,b;    char sign,i;    do    {        cout<<"input a complex number(a+bi或a-bi)";        input>>a>>sign>>b>>i;    }    while(!((sign=='+'||sign=='-')&&i=='i'));    c.real=a;    c.imag=(sign=='+')?b:-b;    return input;}ostream& operator << (ostream& output,const Complex& c){    output<<"("<<c.real;    if (c.imag>=0) output<<"+";    output<<c.imag<<"i";    return output;}Complex operator+(Complex &c1,Complex &c2){    Complex c;    c.real=c1.real+c2.real;    c.imag=c1.imag+c2.imag;    return c;}Complex operator+(double d1,Complex &c2){    Complex c(d1,0);    return c+c2;}Complex operator+(Complex &c1,double d2){    Complex c(0,d2);    return c1+c;}Complex operator-(Complex &c1,Complex &c2){    Complex c;    c.real=c1.real-c2.real;    c.imag=c1.imag-c2.imag;    return c;}Complex operator-(double d1,Complex &c2){    Complex c(d1,0);    return c-c2;}Complex operator-(Complex &c1,double d2){    Complex c(0,d2);    return c1-c;}Complex operator*(Complex &c1,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*(double d1,Complex &c2){    Complex c(d1,0);    return c*c2;}Complex operator*(Complex &c1,double d2){    Complex c(0,d2);    return c1*c;}Complex operator/(Complex &c1,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/(double d1,Complex &c2){    Complex c(d1,0);    return c/c2;}Complex operator/(Complex &c1,double d2){    Complex c(0,d2);    return c1/c;}int main(){    Complex c1,c2,c3;    double d=11;    cout<<"c1: "<<endl;;    cin>>c1;    cout<<"c2: "<<endl;    cin>>c2;    cout<<"c1="<<c1<<endl;    cout<<"c2="<<c2<<endl;    cout<<"d="<<d<<endl;    //cout<<"-c1="<<(-c1);    c3=c1+c2;    cout<<"c1+c2="<<c3<<endl;    cout<<"c1+d="<<(c1+d)<<endl;    cout<<"d+c1="<<(d+c1)<<endl;    c3=c1-c2;    cout<<"c1-c2="<<c3<<endl;    cout<<"c1-d="<<(c1-d)<<endl;    cout<<"d-c1="<<(d-c1)<<endl;    c3=c1*c2;    cout<<"c1*c2="<<c3<<endl;    cout<<"c1*d="<<(c1*d)<<endl;    cout<<"d*c1="<<(d*c1)<<endl;    c3=c1/c2;    cout<<"c1/c2="<<c3<<endl;    cout<<"c1/d="<<(c1/d)<<endl;    cout<<"d/c1="<<(d/c1)<<endl;    return 0;}