C++走向远洋——48（项目一1、复数类中的运算符重载、类的成员函数）

*/
 * Copyright (c) 2016，烟台大学计算机与控制工程学院
 * All rights reserved.
 * 文件名：text.cpp
 * 作者：常轩
 * 微信公众号：Worldhello
 * 完成日期：2016年5月14日
 * 版本号：V1.0
 * 问题描述：复数类中的运算符重载
 * 程序输入：无
 * 程序输出：见运行结果
 */
#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;  
};  //下面定义成员函数  

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;  
}  



//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;  
}  

运算结果：

心得：

以后要细心，做这个程序时看着实践指导敲，还敲错了好几个地方