/*
* 程式的版權和版本宣告部分
* Copyright (c)2013, 煙臺大學計算機學院學生
* All rightsreserved.
* 檔名稱： object.cpp
* 作者：趙曉晨
* 完成日期： 2013年04月18日
* 版本號： v1.0
* 輸入描述：無
* 問題描述：無
* 程式輸出：無
*/
#include <iostream>
using namespace std;
class Complex
{
public:
    Complex(){real=0;imag=0;}
    Complex(double r,double i){real=r;imag=i;}
    //過載函式做友元函式（與double型資料進行運算）
    friend Complex operator+(double c1,Complex &c2);
    friend Complex operator-(double c1,Complex &c2);
    friend Complex operator*(double c1,Complex &c2);
    friend Complex operator/(double c1,Complex &c2);
    friend Complex operator-(Complex &c2);
    void display();
private:
    double real;
    double imag;
};
//定義運算子+過載函式
Complex operator+(double c1,Complex &c2)
{
   return Complex(c1+c2.real,c2.imag);
}
Complex  operator-(double c1,Complex &c2)
{
   return Complex(c1-c2.real,c2.imag);
}
Complex  operator*(double c1,Complex &c2)
{
   return Complex(c1*c2.real,c1*c2.imag);
}
Complex  operator/(double c1,Complex &c2)
{
    double d=c2.imag*c2.imag+c2.real*c2.real;
   return Complex(c1*c2.real/d,-c1*c2.imag/d);
}
Complex   operator-(Complex &c2)
{
   return Complex(-c2.real,-c2.imag);
}
void Complex::display()
{
    if(imag>0)
		cout<<real<<"+"<<imag<<"i"<<endl;
	else
		cout<<real<<imag<<"i"<<endl;
}
//main函式進行測試
int main()
{
    Complex c1(1,2),c2(-1,-2),c3(3,4),c4(-3,-4),c5,c6,c7,c8,c9(5,6),c10;
    c5=1.2+c1;
    c5.display();
    c6=2.3-c2;
    c6.display();
    c7=2.1*c3;
    c7.display();
    c8=2.5/c4;
    c8.display();
    c10=-c9;
    c10.display();
    return 0;
}
 

結果：