第九周——运算符重载——项目一复数类（续）

来源：互联网发布：凯里欧文2017数据编辑：程序博客网时间：2024/05/17 03:53

问题及代码：

/**Copyright (c) 2014,烟台大学计算机学院*All rights reserved.*文件名称:lily.cpp*作者:李莉*完成日期:2015年5月5日版本号:v1.0**问题描述：利用运算符重载，重载输入输出流和-*程序输入：无输入*程序输出：运算后的结果*/#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 ostream& operator<<(ostream& output,const Complex &c);    friend istream& operator>>(istream& input,Complex &c);    friend Complex operator+(const Complex &c1, Complex &c2);    friend Complex operator-(const Complex &c1, Complex &c2);    friend Complex operator-(double d1, Complex &c2);    friend Complex operator*(const Complex &c1, Complex &c2);    friend Complex operator/(const Complex &c1, Complex &c2);    void display();private:    double real;    double imag;};ostream& operator<<(ostream&output,const Complex &c){    output<<"("<<c.real;    output<<"("<<c.real;    if(c.imag>=0) output<<"+";    output<<c.imag<<"i)";    return output;    return output;}istream& operator>>(istream& input,Complex &c){    double a,b;    char s,i;        while(!((s=='-'||s=='+')&&(i=='i')));    {        cout<<"请输入一个虚数(a+bi或者a-bi)："<<endl;        input>>a>>s>>b>>i;    }    c.real=a;    c.imag=(s=='+')?b:-b;    return input;}Complex Complex::operator-(){    return (0-*this);}Complex operator+(const Complex &c1, Complex &c2){    Complex c;    c.real=c1.real+c2.real;    c.imag=c1.imag+c2.imag;    return c;}Complex operator-(const 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*(const 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/(const 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<<")"<<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;}

运行结果：

心得体会：

自己写完之后差点纠结死啊。。我为什么把输入的时候Complex &c设定成了静态常量，结果给了一个错误就是assignment of menber 'Complex::real' in ready-only object。。郁闷得要死啊。。下次注意。const不能随便用了

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