4. 关系运算符的重载

作用：重载关系运算符，可以让两个自定义类型对象进行对比操作


示例：
**

class Person
{
public:
    Person(string name, int age)
    {
        this->m_Name = name;
        this->m_Age = age;
    };
    bool operator==(Person & p)
    {
        if (this->m_Name == p.m_Name && this->m_Age == p.m_Age)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    bool operator!=(Person & p)
    {
        if (this->m_Name == p.m_Name && this->m_Age == p.m_Age)
        {
            return false;
        }
        else
        {
            return true;
        }
    }
    string m_Name;
    int m_Age;
};
void test01()
{
    //int a = 0;
    //int b = 0;
    Person a("孙悟空", 18);
    Person b("孙悟空", 18);
    if (a == b)
    {
        cout << "a和b相等" << endl;
    }
    else
    {
        cout << "a和b不相等" << endl;
    }
    if (a != b)
    {
        cout << "a和b不相等" << endl;
    }
    else
    {
        cout << "a和b相等" << endl;
    }
}
int main() {
    test01();
    system("pause");
    return 0;
}