加号运算符重载
作用：实现两个自定义数据类型相加的运算
class Person {
public:
Person() {};
Person(int a, int b)
{
this->m_A = a;
this->m_B = b;
}
//成员函数实现 + 号运算符重载
Person operator+(const Person& p) {
Person temp;
temp.m_A = this->m_A + p.m_A;
temp.m_B = this->m_B + p.m_B;
return temp;
}
public:
int m_A;
int m_B;
};
//全局函数实现 + 号运算符重载
//Person operator+(const Person& p1, const Person& p2) {
// Person temp(0, 0);
// temp.m_A = p1.m_A + p2.m_A;
// temp.m_B = p1.m_B + p2.m_B;
// return temp;
//}
//运算符重载 可以发生函数重载
Person operator+(const Person& p2, int val)
{
Person temp;
temp.m_A = p2.m_A + val;
temp.m_B = p2.m_B + val;
return temp;
}
void test() {
Person p1(10, 10);
Person p2(20, 20);
//成员函数方式
Person p3 = p2 + p1; //相当于 p2.operaor+(p1)
cout << "mA:" << p3.m_A << " mB:" << p3.m_B << endl;
Person p4 = p3 + 10; //相当于 operator+(p3,10)
cout << "mA:" << p4.m_A << " mB:" << p4.m_B << endl;
}
int main() {
test();
system("pause");
return 0;
}
总结1：对于内置的数据类型的表达式的的运算符是不可能改变的
总结2：不要滥用运算符重载
