15第九周项目2——复数类中的运算符重载（续）2

15第九周项目二——复数类中的运算符重载（续）2

/*
 * Copyright (c) 2014, 烟台大学计算机学院
 * All rights reserved.
 * 文件名称：test.cpp
 * 作    者：李晓凯
 * 完成日期：2015年 5 月 8 日
 * 版 本 号：v1.0
 *
 * 问题描述：用完整类，定义复数类重载运算符+、-、*、/，和取负运算符“-”，使之用于复数的加减乘除，并定义Complex类中的<<和>>运算符的重载实现输入和输出。

 * 输入描述：
 * 程序输出：运算结果

 */

代码：

#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+(Complex &c1,Complex &c2);
    friend Complex operator-(Complex &c1,Complex &c2);
    friend Complex operator*(Complex &c1,Complex &c2);
    friend Complex operator/(Complex &c1,Complex &c2);
    friend Complex operator+(double d,Complex &c2);
    friend Complex operator-(double d,Complex &c2);
    friend Complex operator*(double d,Complex &c2);
    friend Complex operator/(double d,Complex &c2);
    Complex operator-();
    friend istream& operator>>(istream&,Complex&);
    friend ostream& operator<<(ostream&,const Complex&);
private:
    double real;
    double imag;
};
//下面定义成员函数
Complex operator+(Complex &c1,Complex &c2)
{
    Complex c;
    c.real=c1.real+c2.real;
    c.imag=c1.imag+c2.imag;
    return 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*(Complex &c1,Complex &c2)
{
    Complex c;
    c.real=c1.real*c2.real-c1.imag*c2.imag;
    c.imag=c1.imag*c2.real+c1.imag*c2.imag;
    return c;
}

Complex operator/(Complex &c1,Complex &c2)
{
    Complex c;
    double d;
    d=c2.real*c2.real+c2.imag*c2.imag;
    c.real=(c1.real*c2.real+c1.imag*c2.imag)/d;
    c.imag=(c1.imag*c2.real-c1.real*c2.imag)/d;
    return c;
}

Complex operator+(double d,Complex &c2)
{
    Complex c;
    c.real=d+c2.real;
    c.imag=d+c2.imag;
    return c;
}

Complex operator-(double d,Complex &c2)
{
    Complex c;
    c.real=d-c2.real;
    c.imag=d-c2.imag;
    return c;
}

Complex operator*(double d,Complex &c2)
{
    Complex c;
    c.real=d*c2.real;
    c.imag=d*c2.imag;
    return c;
}

Complex operator/(double d,Complex &c2)
{
    Complex c;
    c.real=c2.real/d;
    c.imag=c2.imag/d;
    return c;
}

Complex Complex::operator-()
{
    Complex m;
    m.real=-real;
    m.imag=-imag;
    return m;
}
istream& operator>>(istream& input,Complex& c)
{
    int m,n;
    input>>m>>n;
    c.real=m;
    c.imag=n;
    return input;
}
ostream& operator<<(ostream& output,const Complex& c)
{
    output<<"("<<c.real<<","<<c.imag<<"i)";
    return output;
}
//下面定义用于测试的main()函数
int main()
{
    Complex c1,c2,c3;
    int d=5;
    cin>>c1;
    cin>>c2;
    cout<<"c1="<<c1<<endl;
    cout<<"c2="<<c2<<endl;
    cout<<"d="<<d<<endl<<endl;
    c3=c1+c2;
    cout<<"c1+c2="<<c3<<endl;
    c3=c1-c2;
    cout<<"c1-c2="<<c3<<endl;
    c3=c1*c2;
    cout<<"c1*c2="<<c3<<endl;
    c3=c1/c2;
    cout<<"c1/c2="<<c3<<endl;
    cout<<"d+c1="<<(d+c1)<<endl;
    cout<<"d-c1="<<(d-c1)<<endl;
    cout<<"d*c1="<<(d*c1)<<endl;
    cout<<"d/c1="<<(d/c1)<<endl;
    c3=-c1;
    cout<<"-c1="<<c3<<endl;
    return 0;
}