通过重载运算符，实现用运算符操作自定义的数据类型。

语法：一个正常的成员函数 把函数名改为operator加上一个操作符。

情况一（用成员函数重载运算符）：

#include<iostream>
using namespace std;
class Person
{
public:
	Person operator+(Person &p)
	{
		Person temp;
		temp.m_A=this->m_A+p.m_A;
		temp.m_B=this->m_B+p.m_B;
		return temp;
	}
	int m_A;
	int m_B;
};
void test01()
{
	Person p1;
	p1.m_A=10;
	p1.m_B=10;
	Person p2;
	p2.m_A=10;
	p2.m_B=10;
	Person p3=p1+p2;    //简化了p3=p1.operator+(p2);
	cout<<p3.m_A<<" "<<p3.m_B<<" "<<endl;
}
int main()
{
	test01();
}

情况二（用全局函数重载运算符）：

#include<iostream>
using namespace std;
class Person
{
public:
	int m_A;
	int m_B;
};
Person operator+(Person &p1,Person &p2)
{
	Person temp;
	temp.m_A=p1.m_A+p2.m_A;
	temp.m_B=p1.m_B+p2.m_B;
	return temp;
}
void test01()
{
	Person p1;
	p1.m_A=10;
	p1.m_B=10;
	Person p2;
	p2.m_A=10;
	p2.m_B=10;
	Person p3=p1+p2;    //简化了p3=operator+(p1,p2);
	cout<<p3.m_A<<" "<<p3.m_B<<" "<<endl;
}
int main()
{
	test01();
}