第九周项目一 复数类的运算符重载

/* * Copyright (c) 2014, 烟台大学计算机学院 * All rights reserved. * 文件名称：test.cpp * 作    者：刘佳琦 * 完成日期：2015年 5 月 2 日 * 版 本 号：v1.0 * * 问题描述:请用类的成员函数，定义复数类重载运算符+、-、*、/，使之能用于复数的加减乘除 * 程序输入：无 * 程序输出：复数各种运算值 */#include <iostream>using namespace std;class Complex{public:    Complex()    {        real=0;        imag=0;    }    Complex(double r,double i)    {        real=r;        imag=i;    }    Complex operator+(const Complex &c2);    Complex operator-(const Complex &c2);    Complex operator*(const Complex &c2);    Complex operator/(const Complex &c2);    friend ostream& operator << (ostream& output, const Complex& c);    friend istream& operator >> (istream& input, Complex& c);private:    double real;    double imag;};//下面定义成员函数istream& operator >> (istream& input, Complex& c){    int a,b;    char sign,i;    do    {        cout<<"input real part and imaginary complex number:";        input>>a>>sign>>b>>i;    }    while(!((sign=='+'||sign=='-')&&i=='i'));  //如果非会一直循环 直到输入正确    c.real=a;    c.imag=(sign=='+')?b:-b;    return input;}ostream& operator << (ostream& output, const Complex& c){    output<<"("<<c.real;    if(c.imag>=0) output<<"+";    output<<c.imag<<"i)";    return output;}Complex Complex::operator+(const Complex &c2){    Complex c;    c.real=real+c2.real;    c.imag=imag+c2.imag;    return c;}Complex Complex::operator-(const Complex &c2){    Complex c;    c.real=real-c2.real;    c.imag=imag-c2.imag;    return c;}Complex Complex::operator*(const Complex &c2){    Complex c;    c.real=real*c2.real-imag*c2.imag;    c.imag=imag*c2.real+real*c2.imag;    return c;}Complex Complex::operator/(const 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;}int main(){    Complex c1(3,4),c2(5,-10);    cout<<"c1="<<c1<<endl;    cout<<"c2="<<c2<<endl;    cout<<"c1+c2="<<c1+c2<<endl;    cout<<"c1-c2="<<c1-c2<<endl;    cout<<"c1*c2="<<c1*c2<<endl;    cout<<"c1/c2="<<c1/c2<<endl;    return 0;}

运行结果：

学习心得：忘了就再看一眼视频，分分钟回忆起