第九周任务一

//* (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：流运算符重载运算符（Complex类）
* 作 者： 张艳明
* 完成日期： 2012 年 4 月 15 日
* 版 本 号： 1.053
* 对任务及求解方法的描述部分
* 输入描述： 复数
* 问题描述： 复数流运算符重载
* 程序输出： ......
* 程序头部的注释结束
//* (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：流运算符重载运算符（Complex类）
* 作 者： 于宸
* 完成日期： 2012 年 4 月 15 日
* 版 本 号： 1.053
* 对任务及求解方法的描述部分
* 输入描述： 复数
* 问题描述： 复数流运算符重载
* 程序输出： ......
* 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);      //定义友元函数
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);
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 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);
}

istream &operator >> (istream &input, Complex &c)    //定义重载运算符<<函数
{
char c1, c2;

cout<< "请输入复数:(格式：5-3i)" << endl;

while(1)
{
input >> c.real >> c1 >> c.imag >> c2;

if(c1 == '-')
{
c.imag = - c.imag;
}

if(c2 != 'i')
{
cout << "输入格式错误！重新输入：";
}

else
{
break;
}

}
return input;
}

ostream &operator << (ostream &output, Complex &c)  //定义重载运算符>>函数
{
output << c.real;

if(c.imag >= 0)
{
output << "+";
}
output << c.imag << "i" << endl;

return output;
}

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, 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;

c3 = c1 * 4;

cout << "c1 * 4 =" << c3;

c3 = c1 / 3;

cout << "c1 / 3 =" << c3;

c3 = 4 + c2;

cout << "4 + c2 =" << c3;

c3 = 4 - c2;

cout << "4 - c2 =" << c3;

c3 = - c1;

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

system("pause");

return 0;
}