第八周上機任務項目1-2用類的友元函數完成運算子的重載

01./*      02.* 程式的著作權和版本聲明部分      03.* Copyright (c)2013, 煙台大學電腦學院學生      04.* All rightsreserved.      5.* 檔案名稱： complex.cpp                                 06.* 作    者：趙冠哲                                  07.* 完成日期：2013年4月19日      08.* 版本號碼： v1.0            09.* 輸入描述：      10.* 問題描述：    11.*/#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);friend Complex operator*(Complex &c1,Complex &c2);friend Complex operator/(Complex &c1,Complex &c2);void display(); private:double real;double 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,c2.imag-c2.imag);}Complex operator*(Complex &c1,Complex &c2){   Complex c;   c.real=c1.real*c2.real-c1.imag*c2.imag;   c.imag=c1.imag*c2.real+c1.imag*c2.imag;   return c;}Complex operator/(Complex &c1,Complex &c2){    Complex c;    c.real=(c1.real*c2.real+c1.imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);    c.imag=(c1.imag*c2.real-c1.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=";c1.display();cout<<"c2=";c2.display();c3=c1+c2;cout<<"c1+c2=";c3.display();c3=c1-c2;cout<<"c1-c2=";c3.display();c3=c1*c2;cout<<"c1*c2=";c3.display();c3=c1/c2;cout<<"c1/c2=";c3.display();return 0;}

運行結果：