//自定義復數類的頭文件(Complex.h)

#ifndef  __COMPLEX_H
#define  __COMPLEX_H

#include <iostream>
#include <cmath>

using namespace std;

class Divbyzero{};

class Complex;  //前向引用聲明
//函數原型聲明
istream &operator>>(istream &is,Complex &c);        
ostream &operator<<(ostream &out,const Complex &c);
Complex operator+(const Complex &c1,const Complex &c2);
Complex operator-(const Complex &c1,const Complex &c2);
Complex operator*(const Complex &c1,const Complex &c2);
Complex operator/(const Complex &c1,const Complex &c2);
bool operator==(const Complex &c1,const Complex &c2);
bool operator!=(const Complex &c1,const Complex &c2);
bool operator>(const Complex &c1,const Complex &c2);
bool operator>=(const Complex &c1,const Complex &c2);
bool operator<(const Complex &c1,const Complex &c2);
bool operator<=(const Complex &c1,const Complex &c2);
//以上幾行只有在VC++6.0 SP5以前的版本才需要

class Complex 
{
  private:
    double rpart;          //實部
    double ipart;          //虛部
    double abs() const;    //計算負數的模
    double norm() const;   //計算負數模的平方
  public:
    //構造函數
    Complex();                                //缺省構造函數
    Complex(const Complex &c);                //拷貝構造函數
    Complex(const double &r,const double &i); //初始化構造函數
    Complex(const double &r);                 //（類型）轉換構造函數
    void setValue(const double &r,const double &i); //設置復數值 
    //重載運算符
    Complex &operator=(const Complex &c);     //賦值=
    Complex operator-();                      //負號-
    //重載算術運算符
    friend Complex operator+(const Complex &c1,const Complex &c2);
    friend Complex operator-(const Complex &c1,const Complex &c2);
    friend Complex operator*(const Complex &c1,const Complex &c2);
    friend Complex operator/(const Complex &c1,const Complex &c2);
    Complex operator+=(const Complex &c);
    Complex operator-=(const Complex &c);
    Complex operator*=(const Complex &c);
    Complex operator/=(const Complex &c);
    //重載關系（比較）運算符
    friend bool operator==(const Complex &c1,const Complex &c2);
    friend bool operator!=(const Complex &c1,const Complex &c2);
    friend bool operator>(const Complex &c1,const Complex &c2);
    friend bool operator>=(const Complex &c1,const Complex &c2);
    friend bool operator<(const Complex &c1,const Complex &c2);
    friend bool operator<=(const Complex &c1,const Complex &c2);
    //重載抽取運算符>>和插入運算符<<，不能重載為類的成員函數
    friend istream &operator>>(istream &is,Complex &c);
    friend ostream &operator<<(ostream &out,const Complex &c);
};

#endif