typeid

#include <iostream>
#include <typeinfo>

using namespace std;

class Person {
protected:
    string name;

public:
    Person(string name = "") : name(name) {};
    virtual ~Person() {}
    string getInfo() {
        return name;
    }
};

class Student : public Person {
    string studentid;

public:
    Student(string name = "", string sid = "") : Person(name), studentid(sid) {};
    string getInfo() {
        return name + ":" + studentid;
    }
};

int main() {
    string s("hello");

    cout << "typeid.name of s           is " << typeid(s).name() << endl;
    cout << "typeid.name of std::string is " << typeid(std::string).name() << endl;
    cout << "typeid.name of Student     is " << typeid(Student).name() << endl;

    if (typeid(std::string) == typeid(s))
        cout << "s is a std::string object." << endl;

    return 0;
}