《第九周任务一》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

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#任务 #c #output #input #system

本文介绍了一个使用C++实现的复数类Complex，该类通过重载运算符实现了复数的加减乘除操作，并提供了友元函数来实现复数的输入和输出功能。

/*

* 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：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

* 作    者：  张斌

* 完成日期：  2012年 4 月 16 日

* 版 本 号： 9-1-1

* 对任务及求解方法的描述部分

* 代码实现

#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 ostream& operator << (ostream&,Complex&);//声明重载运算符“<<”函数
	friend istream& operator >> (istream&,Complex&);//声明重载运算符“>>”函数
private:
	double real;
	double imag;
};
//下面定义成员函数

Complex Complex::operator+(Complex &c2)
{
	Complex c;

	c.real = real + c2.real;

	c.imag = imag + c2.imag;

    return c;
}

Complex Complex::operator-(Complex &c2)
{
	Complex c;

	c.real = real - c2.real;

	c.imag = imag - c2.imag;

    return c;
}

Complex Complex::operator*(Complex &c2)
{
	Complex c;

	c.real = real * c2.real;

	c.imag = imag * c2.imag;

    return c;
}

Complex Complex::operator/(Complex &c2)
{
	Complex c;

	c.real = real / c2.real;

	c.imag = imag / c2.imag;

    return c;
}

ostream& operator << (ostream&output,Complex&c)
{
	if(c.imag > 0)
    {
	output << "(" << c.real << "+" << c.imag << "i)" << endl;
	}
	else
    {
	output << "(" << c.real << c.imag << "i)" << endl;
	}
	return output;
}

istream &operator >> (istream &input,Complex &c)
{
	cout << "请输入要输入的复数：";

	input >> c.real >> c.imag;

	return input;
}

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

	cin >> c1 >> c2;

	cout << "c1="<< c1;

	cout << "c2="<< c2;

	c3 = c1 + c2;

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

	c3 = c1 - c2;

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

	c3 = c1 * c2;

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

	c3 = c1 / c2;

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

	system("pause");

	return 0;
}