第9周-运算符重载(二)-复数类中的运算符重载(续)
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/* * Copyright (c) 2014, 烟台大学计算机学院 * All rights reserved. * 文件名称:test.cpp * 作 者:刘畅 * 完成日期:2015 年 5 月 4 日 * 版 本 号:v1.0 * * 问题描述:在第八周项目1<a target=_blank href="http://blog.csdn.net/liuchang54/article/details/45256303" target="_blank">第八周-运算符重载--实现复数类中的运算符重载-完整的类</a>上 (1)再定义一目运算符 -,-c相当于0-c。 (2)定义Complex类中的<<和>>运算符的重载,实现输入和输出, 改造原程序中对运算结果显示方式,使程序读起来更自然。 * 输入描述: ;* 程序输出: 按要求输出。
代码如下:
#include <iostream>using namespace std;class Complex{public: Complex() { real=0; imag=0; } Complex(double r,double i) { real=r; imag=i; } Complex operator-(); friend istream& operator >> (istream& input, Complex& c); friend ostream& operator << (ostream& output,const Complex& c); friend Complex operator+(Complex &c1, Complex &c2); friend Complex operator+(double d1, Complex &c2); friend Complex operator+(Complex &c1, double d2); friend Complex operator-(Complex &c1, Complex &c2); friend Complex operator-(double d1, Complex &c2); friend Complex operator-(Complex &c1, double d2); friend Complex operator*(Complex &c1, Complex &c2); friend Complex operator*(double d1, Complex &c2); friend Complex operator*(Complex &c1, double d2); friend Complex operator/(Complex &c1, Complex &c2); friend Complex operator/(double d1, Complex &c2); friend Complex operator/(Complex &c1, double d2); void display();private: double real; double imag;};Complex Complex::operator-(){ return(0-*this);}istream& operator >> (istream& input, Complex& c){ int a,b; char s,i; while(!((s=='+'||s=='-')&&i=='i')) { input>>a>>s>>b>>i; } c.real=a; c.imag=(s=='+')?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 operator+(Complex &c1, Complex &c2){ Complex c; c.real=c1.real+c2.real; c.imag=c1.imag+c2.imag; return c;}Complex operator+(double d1, Complex &c2){ Complex c(d1,0); return c+c2;}Complex operator+(Complex &c1, double d2){ Complex c(d2,0); return c1+c;}Complex operator-(Complex &c1, Complex &c2){ Complex c; c.real=c1.real-c2.real; c.imag=c1.imag-c2.imag; return c;}Complex operator-(double d1, Complex &c2){ Complex c(d1,0); return c-c2;}Complex operator-(Complex &c1, double d2){ Complex c(d2,0); return c1-c;}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.real*c2.imag; return c;}Complex operator*(double d1, Complex &c2){ Complex c(d1,0); return c*c2;}Complex operator*(Complex &c1, double d2){ Complex c(d2,0); return c1*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;}Complex operator/(double d1, Complex &c2){ Complex c(d1,0); return c/c2;}Complex operator/(Complex &c1, double d2){ Complex c(d2,0); return c1/c;}int main(){ Complex c1(3,4),c2,c3; double d=11; cout<<"c1="; cout<<c1<<endl; cout<<"-c1="; cout<<-c1<<endl; cout<<"c2:"; cin>>c2; cout<<"c2="; cout<<c2<<endl; cout<<"d="<<d<<endl<<endl; c3=c1+c2; cout<<"c1+c2="<<c3<<endl; cout<<"c1+d="<<(c1+d)<<endl; cout<<"d+c1="<<(d+c1)<<endl<<endl; c3=c1-c2; cout<<"c1-c2="<<c3<<endl; cout<<"c1-d="<<(c1-d)<<endl; cout<<"d-c1="<<(d-c1)<<endl<<endl; c3=c1*c2; cout<<"c1*c2="<<c3<<endl; cout<<"c1*d="<<(c1*d)<<endl; cout<<"d*c1="<<(d*c1)<<endl<<endl; c3=c1/c2; cout<<"c1/c2="<<c3<<endl; cout<<"c1/d="<<(c1/d)<<endl; cout<<"d/c1="<<(d/c1)<<endl<<endl; return 0;}
运行结果:
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