第八周上机任务项目1-3扩展运算符的功能

01./*      
02.* 程序的版权和版本声明部分      
03.* Copyright (c)2013, 烟台大学计算机学院学生      
04.* All rightsreserved.      
5.* 文件名称： complex.cpp                                 
06.* 作    者：赵冠哲                                  
07.* 完成日期：2013年4月19日      
08.* 版本号： v1.0            
09.* 输入描述：      
10.* 问题描述：    
11.*/

#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+(const double &a,Complex &c2);
    friend Complex operator+(Complex &c1,const double &a);
    friend Complex operator-(Complex &c1);
    void display();
private:
    double real;
    double imag;
};

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.real*c2.imag;
    return 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+(const double &a,Complex &c2)
{
    return Complex(a+c2.real,c2.imag);
}

Complex operator+(Complex &c1,const double &a)
{
    return Complex(c1.real+a,c1.imag);
}

Complex operator-(Complex &c1)
{
    return Complex(-c1.real,-c1.imag);
}
void Complex::display()
{
    cout<<"("<<real<<","<<imag<<"i)"<<endl;
}

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=1.66+c2;
    cout<<"1.66+c2=";
    c3.display();
    c3=c1+1.57;
    cout<<"c1+1.66=";
   c3.display();
   cout<<"c3=-c1=";
    c3=-c1;
    c3.display();
    return 0;
}