《第八周任务一-3》实现复数类中的运算符的重载函数

实验内容:实现复数类中的运算符重载定义一个复数类重载运算符+、-、*、/，使之能用于复数的加减乘除。  

* 程序的版权和版本声明部分   

* Copyright (c) 2011, 烟台大学计算机学院学生   

* All rights reserved.   

* 文件名称： 实现复数类中的运算符重载                              

* 作    者：  张斌                              

* 完成日期：  2012       年  4    月 9      日   

* 版 本号： 8-1-3        

* 对任务及求解方法的描述部分   

* 输入描述：  

* 程序头部的注释结束（此处也删除了斜杠）   

*/  

/*【任务1】实现复数类中的运算符重载定义一个复数类重载运算符+、-、*、/，使之能用于复数的加减乘除。 

（2）方案二：请用类的友元函数，而不是成员函数，完成上面提及的运算符的重载； 

（3）方案三：在方案二的基础上，扩展+、-、*、/运算符的功能，使之能与double型数据进行运算。设Complex c; double d; c?d和d?c的结果为将d视为实部为d的复数同c运算的结果（其中?为+、-、*、/之一）。另外，定义一目运算符-，-c相当于0-c。；*/  

#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(35, 44), c2(54, -41), 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;
}