实验七运算符重载

最新推荐文章于 2021-12-13 19:44:09 发布

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最新推荐文章于 2021-12-13 19:44:09 发布 · 1.9k 阅读

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实验探讨了运算符重载的两种形式——成员函数和友元函数。成员函数通常用于单目运算符和需要修改对象状态的情况，而友元函数适合双目运算符和需要隐式类型转换的情况。不能作为友元函数重载的双目运算符包括=、()、[]和->。此外，类型转换函数只能是成员函数。实验加深了对运算符重载的理解。

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实验目的和要求

熟悉运算符重载的定义和使用方法

实验内容：

1.调试下列程序

#include<iostream>  
using namespace std;  
class complex  
{  
    public:  
        complex(){real=imag=0.0;}  
        complex(double r){real=r;imag=0.0;}  
        complex(double r,double i){real=r;imag=i;}  
        complex operator + (const complex &c);  
        complex operator - (const complex &c);  
        complex operator * (const complex &c);  
        complex operator / (const complex &c);  
        friend void print(const complex &c);  
    private:  
        double real,imag;  
};  
inline complex complex::operator + (const complex &c)  
{  
    return complex(real+c.real,imag+c.imag);  
}  
inline complex complex::operator - (const complex &c)  
{  
    return complex(real-c.real,imag-c.imag);  
}  
inline complex complex::operator * (const complex &c)  
{  
    return complex(real*c.real-imag*c.imag,real*c.imag+imag*c.real);  
}  
inline complex complex::operator / (const complex &c)  
{  
    return complex((real*c.real+imag*c.imag)/(c.real*c.real+c.imag*c.imag),(imag*c.real-real*c.imag)/(c.real*c.real+c.imag*c.imag));  
}  
void print(const complex &c)  
{  
    if(c.imag<0)  
        cout<<c.real<<c.imag<<"i";  
    else  
        cout<<c.real<<"+"<<c.imag<<"i";  
}  
int main()  
{  
    complex c1(2.0),c2(3.0,-1.0),c3;  
    c3=c1+c2;  
    cout<<"\nc1+c2= ";  
    print(c3);  
    c3=c1-c2;  
    cout<<"\nc1-c2= ";  
    print(c3);  
    c3=c1*c2;  
    cout<<"\nc1*c2= ";  
    print(c3);  
    c3=c1/c2