第9周实验报告1

/* (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：复数类改
* 作    者：张旭
* 完成日期：  2012   年   4   月    18  日
* 版 本 号：略
* 对任务及求解方法的描述部分
* 输入描述：略
* 问题描述：略
* 程序输出：略
* 程序头部的注释结束
*/
#include <iostream>
#include <cmath>

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 istream &operator>>(istream &input, Complex &d);

friend ostream &operator<<(ostream &output, Complex &d);

void display();

private:

double real;

double imag;
};

//下面定义成员函数

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;
}

//下面定义改
istream &operator>>(istream &input, Complex &d)
{
char c;

input >> d.real;

cin >> c;

input >> d.imag;

if (c == '-')
{
d.imag = -d.imag;
}
cin >> c;

return input;
}

ostream &operator <<(ostream &output, Complex &d)
{
output << d.real;

if (d.imag > 0)
{
cout << '+';
}
output << d.imag;

cout << 'i';

return output;
}

int main()
{
Complex c1(3,4),c2(5,-10),c3;

cin >> c3;

cout << c1 << endl << c2 << endl << c3;

system("pause");

return 0;
}