第八周【项目1-实现复数类中的运算符重载】

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问题及代码：

/* *Copyright (c) 2014,烟台大学计算机学院 *ALL right reserved *文件名：学生成绩统计 *作者；童宇 *完成日期：2015 年 4 月 25 日 *版本号v1.0 *问题描述：（3）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。 *输入描述： *程序输出： */#include <iostream>using namespace std;class Complex{private:    double real;    double imag;public:    Complex()    {        real=0;        imag=0;    }    Complex(double r,double i)    {        real=r;        imag=i;    }    void setreal(double a)    {        real=a;    }    void setimag(double b)    {        imag=b;    }    double getreal()    {        return real;    }    double getimag()    {        return imag;    }    void display();};Complex operator+(Complex &c1, Complex &c2){    Complex c;    double a,b;    a=c1.getreal()+c2.getreal();    c.setreal(a);    b=c1.getimag()+c2.getimag();    c.setimag(b);    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;    double a,b;    a=c1.getreal()-c2.getreal();    c.setreal(a);    b=c1.getimag()-c2.getimag();    c.setimag(b);    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;    double a,b;    a=c1.getreal()*c2.getreal();    c.setreal(a);    b=c1.getimag()*c2.getimag();    c.setimag(b);    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;    double a,b;    a=c1.getreal()/c2.getreal();    c.setreal(a);    b=c1.getimag()/c2.getimag();    c.setimag(b);    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;}void Complex::display(){    cout<<"("<<real<<","<<imag<<"i)"<<endl;}int main(){    Complex c1(3,4),c2(5,-10),c3;    double d=11;    cout<<"c1=";    c1.display();    cout<<"c2=";    c2.display();    cout<<"d="<<d<<endl<<endl;    cout<<"下面是重载运算符的计算结果: "<<endl;    c3=c1+c2;    cout<<"c1+c2=";    c3.display();    cout<<"c1+d=";    (c1+d).display();    cout<<"d+c1=";    (d+c1).display();    c3=c1-c2;    cout<<"c1-c2=";    c3.display();    cout<<"c1-d=";    (c1-d).display();    cout<<"d-c1=";    (d-c1).display();    c3=c1*c2;    cout<<"c1*c2=";    c3.display();    cout<<"c1*d=";    (c1*d).display();    cout<<"d*c1=";    (d*c1).display();    c3=c1/c2;    cout<<"c1/c2=";    c3.display();    cout<<"c1/d=";    (c1/d).display();    cout<<"d/c1=";    (d/c1).display();    return 0;}

运行结果：

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