第八週實驗報告（一）《方案二》用類的友元函數

/*

實驗目的：1.學會定義類中雙目和單目運算符的重載函數

          2.學會使用類的成員函數和友元函數實現運算符的重載

* 程序的版權和版本聲明部分

* Copyright (c) 2011, 煙臺大學計算機學院學生 

* All rights reserved.

* 文件名稱：方案一 用類的重載運算符 +、-、*、/，使之能用於複數的加減乘除                              

* 作    者：  晁 陽                            

* 完成日期：  2012年 4 月 7 日

* 版 本 號： t.10         

* 對任務及求解方法的描述部分

* 代碼實現

#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);//聲明重載運算符“+”的友元函數
	friend Complex operator-(Complex &c1,Complex &c2);//聲明重載運算符“-”的友元函數
	friend Complex operator*(Complex &c1,Complex &c2);//聲明重載運算符“*”的友元函數
	friend Complex operator/(Complex &c1,Complex &c2);//聲明重載運算符“/”的友元函數	
	void display();
private:
	double real;
	double imag;
};
//下面定義成員函數

 Complex operator+(Complex &c1,Complex &c2)//定義重載運算符“+”的友元函數
{
	Complex c;
	c.real = c1.real + c2.real;
	c.imag = c1.imag + c2.imag;
	return c;
}

 Complex operator-(Complex &c1,Complex &c2)//定義重載運算符“-”的友元函數
{
	Complex c;
	c.real = c1.real - c2.real;
	c.imag = c1.imag - c2.imag;
	return c;
}

 Complex operator*(Complex &c1,Complex &c2)//定義重載運算符“*”的友元函數
{
	Complex c;
	c.real = c1.real * c2.real;
	c.imag = c1.imag * c2.imag;
	return c;
}

 Complex operator/(Complex &c1,Complex &c2)//定義重載運算符“/”的友元函數
{
	Complex c;
	c.real = c1.real / c2.real;
	c.imag = c1.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();
	system("pause");
	return 0;
}