C++核心编程 运算符重载

加号运算符重载

 

 

运算符重载的本质是  

//成员函数重载本质调用
Person  p3 = p1.operator+(p2);
Person p3 = p1 +p2;

//全局函数重载本质调用 
Person p3 = operator+(p1,p2);


//需注意  运算符重载  也可以发生函数重载
Person p3 = p1 +10;//person 数据类型 + int 

Person operator+（Person &p1,int num）{
　　Person temp;
temp.m_A = p1.m_A +num;

temp.m_B = p1.m_B +num;

return temp;

}

左移运算符重载

//只能利用全局函数重载左移运算符
ostream & operator <<(ostream &cout,Person &p) //本质 operator << (cout，p) 简化 cout<<p
{

cout <<"m_A=" << p.m_A <<"m_B=" <<p.m_B;
return cout;
}

void test01()
{
cout <<p <<endl;//链式编程思想
}

 递增运算符

 

 

 

 

 赋值运算符重载

 

关系运算符重载

 

 函数调用运算符重载