Determining an Object's Type at Runtime - C++ Class

C++ examples for Class:typeid

  1. HOME
  2. C++
  3. Class
  4. typeid

Description

Determining an Object's Type at Runtime

Demo Code

#include <iostream>
#include <typeinfo>

using namespace std;

class Base {};//from  ww w .  j a v  a2  s .c o  m
class Derived : public Base {};

int main() {

   Base b, bb;
   Derived d;

   // Use typeid to test type equality
   if (typeid(b) == typeid(d)) { // No
      cout << "b and d are of the same type.\n";
   }
   if (typeid(b) == typeid(bb)) { // Yes
      cout << "b and bb are of the same type.\n";
   }
   if (typeid(d) == typeid(Derived)) { // Yes
      cout << "d is of type Derived.\n";
   }
}

Result


Related Tutorials