C++ 运算符重载
来源：程序员人生 发布时间：2015-06-23 08:57:29 阅读次数：2207次
<span style="font-family: Arial, Helvetica, sans-serif;">#include <iostream></span>
using namespace std;
class complex
{
public:
// 带缺省值的构造函数
complex (double real = 0, double image = 0)
:_real(real)
,_image(image)
{
cout<<"complex (double real = 0, double image = 0)"<<endl;
}
// 析构函数
~complex()
{
cout<<"~complex()"<<endl;
}
// 拷贝构造函数
complex (const complex& d)
:_image(d._image)
,_real(d._real)
{
cout<<"complex (const complex& d)"<<endl;
}
// 赋值运算符重载
complex& operator= (const complex& d)
{
cout<<"operator= (const complex& d)"<<endl;
if (this != &d)
{
this->_real = d._real;
this->_image = d._image;
}
return *this;
}
// 取地址运算符重载
complex* operator& ()
{
cout<<"operator&()"<<endl;
return this;
}
// const修饰的取地址运算符重载
const complex* operator& () const
{
cout<<"operator&() const"<<endl;
return this;
}
void display()
{
cout<<"real:"<<_real<<"--image:"<<_image<<endl<<endl;
}
// 请实现下面的运算符重载！
complex& operator++() //前置++ //返回当前对象本身
{
cout<<"operator++()"<<endl;
_real++;
_image++;
return *this; //可以立即体现出前置++的值
}
complex operator++(int)//后置++
{
cout<<"operator++(int)"<<endl;
complex c = *this;
this->_real++;
this->_image++;
return c;
}
complex& operator--()
{
cout<<"operator--()"<<endl;
_real--;
_image--;
return *this;
}
complex operator--(int) //后置--
{
cout<<"operator--()"<<endl;
complex c = *this;
this->_real--;
this->_image--;
return c;
}
complex operator+(const complex& c)
{
cout<<"operator+(const complex& c)"<<endl;
return complex(_real+c._real,_image+c._image);
}
complex operator-(const complex& c)
{
cout<<"operator-(const complex& c)"<<endl;
return complex(_real-c._real,_image-c._image);
}
complex& operator-=(const complex& c)
{
cout<<"operator-=(const complex& c)"<<endl;
_real -= c._real;
_image -= c._image;
return *this;
}
complex& operator+=(const complex& c)
{
cout<<"operator+=(const complex& c)"<<endl;
_real += c._real;
_image += c._image;
return *this;
}
complex operator*(const complex& c)
{
cout<<"operator*(const complex& c)"<<endl;
return complex(_real*c._real-_image*c._image,c._image*_real+_image*c._real);
}
complex operator/(const complex& c)
{
cout<<"operator/(const complex& c)"<<endl;
return complex((_real/c._real+_image*c._image)/(c,_real*c._real+c._image*c._image),(_image*c._real-_real*c._image)/(c,_real*c._real+c._image*c._image));
}
private:
double _real;
double _image;
};
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