第八周项目一之实现复数类中的运算符重载

01./*                   
02.*Copyright (c) 2014,烟台大学计算机学院                   
03.*All gight reserved.                   
04.*文件名称：temp.cpp                   
05.*作者：张震刚                  
06.*完成时间：2015年4月28日                   
07.*版本号：v1.0                   
08.*问题描述：用类的成员函数，定义复数类重载运算符+-*/，使之能运用于复数的加减乘除。                 
09.*输入描述：无。                  
10.*输出描述：无。                    
11.*/

#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);
    void display();
private:
    double real;
    double imag;
};
Complex Complex::operator+(const Complex &c2)
{
    Complex c;
    c.real=real+c2.real;
    c.imag=imag+c2.imag;
    return c;
}
Complex Complex::operator-(const Complex &c2)
{
    Complex c;
    c.real=real-c2.real;
    c.imag=imag-c2.imag;
    return c;
}
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;
}
Complex 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;
}
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();
    return 0;
}