《C++第九周实验报告1-1》--------接第8周任务1，定义Complex类中的<<和>>运算符的重载，实现输入和输出

/* (程序头部注释开始)
* 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：  Complex.cpp                            
* 作    者：   计114-3 王兴锋     
* 完成日期：    2012  年  4 月  16  日
* 版 本 号：       V 2.0

* 对任务及求解方法的描述部分
* 输入描述： 实现复数类中的运算符重载
* 问题描述：定义一个复数类重载运算符+、-、*、/，使之能用于复数的加减乘除。
			定义Complex类中的<<和>>运算符的重载，实现输入和输出，
			改造原程序中对运算结果显示方式，使程序读起来更自然。
* 程序输出： +、-、*、/，对复数运算后的结果。
* 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;}
	Complex operator+ (Complex &c2);
	Complex operator- (Complex &c2);
	Complex operator* (Complex &c2);
	Complex operator/ (Complex &c2);
	friend istream& operator >> (istream&, Complex&);
	friend ostream& operator << (ostream&, Complex&);
private:
	double real;
	double imag;
};
//下面定义成员函数
Complex Complex::operator+ (Complex &c2)
{
	return Complex(this->real + c2.real, this->imag + c2.imag);
}
Complex Complex::operator- (Complex &c2)
{
	return Complex(this->real - c2.real, this->imag - c2.imag);
}
Complex Complex::operator* (Complex &c2)
{
	Complex c;
	
	c.real = real*c2.real - imag*c2.imag;
	c.imag = real*c2.imag + imag*c2.real;
	
	return c;
}
Complex Complex::operator/ (Complex &c2)
{
	Complex c;
	
	c.real = (real*c2.real + imag*c2.imag)/(c2.real*c2.real + c2.imag*c2.imag);
	c.imag = (-real*c2.imag + imag*c2.real)/(c2.real*c2.real + c2.imag*c2.imag);
	
	return c;
}
istream& operator >> (istream& input, Complex& c)
{
	cout << "请输入复数的实部和虚部的数字：" << endl;
	input >> c.real >> c.imag;

	return input;
}
ostream& operator << (ostream& output, Complex& c)
{
	output << "(" << c.real << "," << c.imag << ")";

	return output;
}

int main()
{
	Complex c1, c2, c3;

	cin >> c1 >> c2;

	cout << "c1=" << c1 << endl;
	cout << "c2=" << c2 << endl;

	c3 = c1 + c2;
	cout << "c1+c2=" << c3 << endl;

	c3 = c1 - c2;
	cout << "c1-c2=" << c3 << endl;

	c3 = c1 * c2;
	cout << "c1*c2=" << c3 << endl;

	c3 = c1 / c2;
	cout << "c1/c2=" << c3 << endl;

	system("pause");
	return 0;
}
/*
定义了<< >> 运算的重载。使得程序读起来更加的符合大多人得想法。
读起来更加容易一些。
*/