C++程序设计实验报告（五十三）---第八周任务1-3

/* (程序头部注释开始)
* 程序的版权和版本声明部分
* Copyright (c) 2012, 烟台大学计算机学院学生
* All rights reserved.
* 文件名称：重载运算符（复数）

* 作 者： 刘镇
* 完成日期： 2012 年 4 月 7 日
* 版 本 号： 1.049
* 对任务及求解方法的描述部分
* 输入描述： ......

* 问题描述： 友元函数实现运算符重载，复数运算

* 程序输出： 复数

* 程序头部的注释结束
*/

#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 + (Complex &c1, Complex &c2);
	friend Complex operator + (Complex &c, const double &d);
	friend Complex operator + (const double &d, Complex &c);
	friend Complex operator - (Complex &c, const double &d);
	friend Complex operator - (const double &d, Complex &c);
	friend Complex operator * (Complex &c, const double &d);
	friend Complex operator * (const double &d, Complex &c);
	friend Complex operator / (Complex &c, const double &d);
	friend Complex operator / (const double &d, Complex &c);
	friend Complex operator - (Complex &c);
	void display();
private:
	double real;
	double imag;
};
//下面定义成员函数

Complex operator - (Complex &c)
{
	return Complex(0 - c.real, c.imag);
}

Complex operator+(Complex &c1, Complex &c2)
{
	return Complex(c1.real + c2.real, c1.imag + c2.imag);
}

Complex operator-(Complex &c1, Complex &c2)
{
	return Complex(c1.real - c2.real, c1.imag - c2.imag);
}

Complex operator*(Complex &c1, Complex &c2)
{
	return Complex(c1.real * c2.real, c1.imag * c2.imag);
}

Complex operator/(Complex &c1, Complex &c2)
{
	return Complex(c1.real / c2.real, c1.imag / c2.imag);
}

void Complex::display()
{
	cout << "(" << real << "," << imag << "i )" << endl;
}

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

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

Complex operator- (Complex &c, const double &d)
{ 
	return Complex(d - c.real, c.imag);
}

Complex operator- (const double &d, Complex &c)
{ 
	return Complex(d - c.real, c.imag);
}

Complex operator* (Complex &c, const double &d)
{ 
	return Complex(d * c.real, c.imag);
}

Complex operator* (const double &d, Complex &c)
{ 
	return Complex(d * c.real, c.imag);
}

Complex operator/ (Complex &c, const double &d)
{ 
	return Complex(d / c.real, c.imag);
}

Complex operator/ (const double &d, Complex &c)
{ 
	return Complex(d / c.real, c.imag);
}


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 = c1 * 4;

	cout << "c1 * 4 =";

	c3.display();

	c3 = c1 / 3;

	cout << "c1 / 3 =";

	c3.display();

	c3 = 4 + c2;

	cout << "4 + c2 =";

	c3.display();

	c3 = 4 - c2;

	cout << "4 - c2 =";

	c3.display();

	c3 = - c1;

	cout << "- c1 =" ;

	c3.display();

	system("pause");

	return 0;
}

运行结果：