第十二周上机实践项目 项目1-实现复数类中的运算符重载 (3)

问题及代码：

（1）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

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1. class Complex   
2. {  
3. public:  
4.     Complex(){real=0;imag=0;}  
5.     Complex(double r,double i){real=r; imag=i;}  
6.     Complex operator+(const Complex &c2);  
7.     Complex operator-(const Complex &c2);  
8.     Complex operator*(const Complex &c2);  
9.     Complex operator/(const Complex &c2);  
10.     void display();  
11. private:  
12.     double real;  
13.     double imag;  
14. };  
15. //下面定义成员函数  
16.   
17.   
18. //下面定义用于测试的main()函数  
19. int main()  
20. {  
21.     Complex c1(3,4),c2(5,-10),c3;  
22.     cout<<"c1=";  
23.     c1.display();  
24.     cout<<"c2=";  
25.     c2.display();  
26.     c3=c1+c2;  
27.     cout<<"c1+c2=";  
28.     c3.display();  
29.     c3=c1-c2;  
30.     cout<<"c1-c2=";  
31.     c3.display();  
32.     c3=c1*c2;  
33.     cout<<"c1*c2=";  
34.     c3.display();  
35.     c3=c1/c2;  
36.     cout<<"c1/c2=";  
37.     c3.display();  
38.     return 0;  
39. }  

（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。

/* Copyright(c)2016,烟台大学计算机与控制工程学院  All rights reserced 文件名称：test.cpp 作    者：蔡汝佳 完成日期：2016年6月2日 版 本 号：v1.0 问题描述： 输入描述： 程序输出：*/#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,const Complex &c2);    friend Complex operator+(const double d,const Complex &c2);    friend Complex operator+(const Complex &c2,const double d);    friend Complex operator-(const Complex &c1,const Complex &c2);    friend Complex operator-(const double d,const Complex &c2);    friend Complex operator-(const Complex &c2,const double d);    friend Complex operator*(const Complex &c1,const Complex &c2);    friend Complex operator*(const double d,const Complex &c2);    friend Complex operator*(const Complex &c2,const double d);    friend Complex operator/(const Complex &c1,const Complex &c2);    friend Complex operator/(const double d,const Complex &c2);    friend Complex operator/(const Complex &c2,const double d);    void display();private:    double real;    double imag;};//下面定义成员函数Complex operator+(const Complex &c1,const Complex &c2){    Complex c;    c.real=c1.real+c2.real;    c.imag=c1.imag+c2.imag;    return c;}Complex operator+(const double d,const Complex &c2){    Complex c(d,0);    return c+c2;}Complex operator+(const Complex &c2,const double d){    Complex c(d,0);    return c+c2;}Complex operator-(const Complex &c1,const Complex &c2){    Complex c;    c.real=c1.real-c2.real;    c.imag=c1.imag-c2.imag;    return c;}Complex operator-(const double d,const Complex &c2){    Complex c(d,0);    return c-c2;}Complex operator-(const Complex &c2,const double d){    Complex c(d,0);    return c2-c;}Complex operator*(const Complex &c1,const 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 double d,const Complex &c2){    Complex c(d,0);    return c*c2;}Complex operator*(const Complex &c2,const double d){    Complex c(d,0);    return c*c2;}Complex operator/(const Complex &c1,const 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/(const double d,const Complex &c2){    Complex c(d,0);    return c/c2;}Complex operator/(const Complex &c2,const double d){    Complex c(d,0);    return c2/c;}void Complex::display(){    cout<<"("<<real<<","<<imag<<")"<<endl;}//下面定义用于测试的main()函数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：

知识点总结：

学习心得：