第九周 项目一 复数类中的运算符重载（续）

问题及代码：

/**Copyright (c)2014,烟台大学计算机与控制工程学院*All rights reserved.*文件名称：Project.cpp*作    者：chenqin.*完成日期：2015年4月25日*版 本 号：v1.0**问题描述：定义一个定义完整的类（是可以当作独立的产品发布，成为众多项目中的“基础工程”）。这样的类在(2)的基础上，扩展+、-、*、/运算符的功能，使之能与double型数据进行运算。设Complex c; double d; c+d和d+c的结果为“将d视为实部为d的复数同c相加”，其他-、*、/运算符类似。*程序输入：略*程序输出：略*/#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+(const Complex &c1,Complex &c2);    friend Complex operator-(const Complex &c1,Complex &c2);    friend Complex operator*(const Complex &c1,Complex &c2);    friend Complex operator/(const Complex &c1,Complex &c2);    Complex operator+(double &i);    friend Complex operator+(double &i,Complex &c2);    Complex operator-(double &i);    friend Complex operator-(double &i,Complex &c2);    Complex operator*(double &i);    friend Complex operator*(double &i,Complex &c2);    Complex operator/(double &i);    friend Complex operator/(double &i,Complex &c2);    friend istream& operator>>(istream &,Complex &);    friend ostream& operator<<(ostream &,Complex &);    Complex operator-();private:    double real;    double imag;};//下面定义成员函数istream& operator>>(istream&input,Complex &c){    cout<<"input real part and imaginary part of complex number:";    input>>c.real>>c.imag;    return input;}ostream& operator<<(ostream&output,Complex &c){    output<<"("<<c.real;    if(c.imag>=0)        output<<"+";    else        output<<c.imag<<"i)"<<endl;        return output;}Complex Complex::operator-(){    return (-*this);}Complex operator+(const Complex &c1,Complex &c2){    return Complex(c1.real+c2.real,c1.imag+c2.imag);}Complex Complex::operator+(double &i){    return Complex(real+i,imag);}Complex operator+(double &i,Complex &c2){    return Complex(i+c2.real,c2.imag);}Complex operator-(const Complex &c1,Complex &c2){    return Complex(c1.real-c2.real,c1.imag-c2.imag);}Complex Complex::operator-(double &i) {     return Complex(real-i,imag); } Complex operator-(double &i,Complex &c2) {     return Complex(i-c2.real,-c2.imag); }//复数相乘：(a+bi)(c+di)=(ac-bd)+(bc+ad)i.Complex operator*(const Complex &c1,Complex &c2){    return Complex((c1.real*c2.real)-(c1.imag*c2.imag),(c1.imag*c2.real)+(c1.real*c2.imag));}Complex Complex::operator*(double &i) {     return Complex(real*i,imag*i); } Complex operator*(double &i,Complex &c2) {     return Complex(i*c2.real,i*c2.imag); }//复数相除：(a+bi)/(c+di)=(ac+bd)/(c^2+d^2) +(bc-ad)/(c^2+d^2)iComplex operator/(const Complex &c1,Complex &c2){    return Complex((c1.real*c2.real+c1.imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag),(c1.imag*c2.real-c1.real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag));} Complex Complex::operator/(double &i) {     return Complex((real*i)/(i*i),(imag*i)/(i*i)); } Complex operator/(double &i,Complex &c2) {     return Complex((i*c2.real)/(c2.real*c2.real+c2.imag*c2.imag),(-i*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag)); }//下面定义用于测试的main()函数int main(){    Complex c1,c2,c3;    double i=10;    cin>>c1;    cout<<"c1="<<c1<<endl;    cin>>c2;    cout<<"c2="<<c2<<endl;    cout<<"i="<<i<<endl;    cout<<"-c1="<<(-c1)<<endl;    cout<<"-c2="<<(-c2)<<endl;    c3=c1+c2;    cout<<"c1+c2="<<c3<<endl;    cout<<"c1+i="<<(c1+i)<<endl;    cout<<"i+c1="<<(i+c1)<<endl;    c3=c1-c2;    cout<<"c1-c2="<<c3<<endl;    cout<<"c1-i="<<(c1-i)<<endl;    cout<<"i-c1="<<(i-c1)<<endl;    c3=c1*c2;    cout<<"c1*c2="<<c3<<endl;    cout<<"c1*i="<<(c1*i)<<endl;    cout<<"i*c1="<<(i*c1)<<endl;    c3=c1/c2;    cout<<"c1/c2="<<c3<<endl;    cout<<"c1/i="<<(c1/i)<<endl;    cout<<"i/c1="<<(i/c1)<<endl;    return 0;}

 

 

#include <iostream>using namespace std;class Complex{public:    Complex()    {        real=0;        imag=0;    }    Complex(double r,double i)    {        real=r;        imag=i;    }    Complex operator-();    //实现输入、输出的运算符重载    friend ostream& operator << (ostream& output, const Complex& c);    friend istream& operator >> (istream& input, Complex& c);    //实现加减乘除的运算符重载    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);private:    double real;    double imag;};//实现输出的运算符重载ostream& operator << (ostream& output, const Complex& c){    output<<"("<<c.real;    if(c.imag>=0) output<<"+";    output<<c.imag<<"i)";    return output;}//实现输入的运算符重载istream& operator >> (istream& input, Complex& c){    int a,b;    char sign,i;    do    {        cout<<"input a complex number(a+bi或a-bi):";        input>>a>>sign>>b>>i;    }    while(!((sign=='+'||sign=='-')&&i=='i'));    c.real=a;    c.imag=(sign=='+')?b:-b;    return input;}Complex Complex::operator-(){    return(0-*this);}//复数相加：(a+bi)+(c+di)=(a+c)+(b+d)i.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; //按运算法则计算的确可以，但充分利用已经定义好的代码，既省人力，也避免引入新的错误，但可能机器的效率会不佳}Complex operator+(Complex &c1, double d2){    Complex c(d2,0);    return c1+c;}//复数相减：(a+bi)-(c+di)=(a-c)+(b-d)i.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;}//复数相乘：(a+bi)(c+di)=(ac－bd)+(bc+ad)i.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;}//复数相除：(a+bi)/(c+di)=(ac+bd)/(c^2+d^2) +(bc-ad)/(c^2+d^2)iComplex 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,c2,c3;    double d=11;    cout<<"c1: "<<endl;;    cin>>c1;    cout<<"c2: "<<endl;    cin>>c2;    cout<<"c1="<<c1<<endl;    cout<<"c2="<<c2<<endl;    cout<<"d="<<d<<endl;    //cout<<"-c1="<<(-c1);    c3=c1+c2;    cout<<"c1+c2="<<c3<<endl;    cout<<"c1+d="<<(c1+d)<<endl;    cout<<"d+c1="<<(d+c1)<<endl;    c3=c1-c2;    cout<<"c1-c2="<<c3<<endl;    cout<<"c1-d="<<(c1-d)<<endl;    cout<<"d-c1="<<(d-c1)<<endl;    c3=c1*c2;    cout<<"c1*c2="<<c3<<endl;    cout<<"c1*d="<<(c1*d)<<endl;    cout<<"d*c1="<<(d*c1)<<endl;    c3=c1/c2;    cout<<"c1/c2="<<c3<<endl;    cout<<"c1/d="<<(c1/d)<<endl;    cout<<"d/c1="<<(d/c1)<<endl;    return 0;}

运行结果：

学习心得：第一个程序是我的，第二个程序是老师的，我就不懂为什么自己的就是错的，运行不出来，到底是哪里出了问题！！！！一直都没有解决这个问题。