Complex類中的

/* * Copyright (c) 2013, 煙台大學電腦學院                     * All rights reserved.                     * 檔案名稱：test.cpp                     * 作者：邱學偉                    * 完成日期：2013 年 4 月 27 日                     * 版本號碼：v1.0                                        * 輸入描述：無                     * 問題描述：定義Complex類中的<<和>>運算子的重載，實現輸入和輸出，            改造原程式中對運算結果顯示方式，使程式讀起來更自然。                  * 程式輸出：* 問題分析：                    * 演算法設計：略                     */         #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&);//friend ostream &operator>>(ostream&,Complex&);//void display();private:double real;double imag;};//複數相加： (a+bi)+(c+di)=(a+c)+(b+d)i. 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){    output<<"("<<c.real<<","<<c.imag<<"i)"<<endl;    return output;}/*ostream &operator>> (ostream&output,Complex &c){    double r,i;    real=r;    imag=i;}*///複數相減：(a+bi)-(c+di)=(a-c)+(b-d)i.Complex Complex::operator-(Complex &c2){Complex c;c.real=real-c2.real;c.imag=imag-c2.imag;return c;}//複數相乘：(a+bi)(c+di)=(ac－bd)+(bc+ad)i.Complex Complex::operator*(Complex &c2){Complex c;c.real=real*c2.real-imag*c2.imag;c.imag=imag*c2.real+real*c2.imag;return c;}//複數相除：(a+bi)/(c+di)=(ac+bd)/(c^2+d^2) +(bc-ad)/(c^2+d^2)i Complex Complex::operator/(Complex &c2){Complex c;c.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);return c;}/*void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}*/int main(){Complex c1(3,4),c2(5,-10),c3;cout<<c1;cout<<c2;c3=c1+c2;cout<<c3;c3=c1-c2;cout<<c3;c3=c1*c2;cout<<c3;c3=c1/c2;cout<<c3;return 0;}