第十二周项目 1.2实现复数类中的运算符重载

/*
*Copyright(c) 2016, 烟台大学计算机与控制工程学院
*All rights reserved.
*文件名称:main.cpp
*作    者：李德坤
*完成日期：2016年5月12日
*版本号：v1.0
*
*问题描述：请用类的友元函数，而不是成员函数，再次完成上面提及的运算符的重载
*输入描述：无
*输出描述：无
*/

#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 Complex &c1,const Complex &c2);
friend Complex operator*(const Complex &c1,const Complex &c2);
friend Complex operator/(const Complex &c1,const Complex &c2);
void display();
private:
double real;
double imag;
};
//下面定义成员函数
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 Complex &c1,const Complex &c2)
{
Complex c;
c.real=c1.real-c2.real;
c.imag=c1.imag-c2.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 Complex &c1,const Complex &c2)
{
Complex c;
c.real=c1.real/c2.real;
c.imag=c1.imag/c2.imag;
return c;
}
void Complex::display()
{
cout<<"("<<real<<","<<imag<<")"<<endl;
}
//下面定义用于测试的main()函数
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;
}