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// Getting the run time type information
#include <iostream>
#include <typeinfo>
using namespace std;

// polymorphic base class...
class __rtti Test
{
   // This makes Test a polymorphic class type.
   virtual void func() {};
};

// derived class...
class Derived : public Test {};

int main(void)
{
   // Instantiate Derived type object...
   Derived DerivedObj;
   // Declare a Derived type pointer
   Derived *DerivedPtr;
   // Initialize the pointer
   DerivedPtr = &DerivedObj;

   // do the run time checking...
   if(typeid(*DerivedPtr) == typeid(Derived))
      // check the type of *DerivedPtr
      cout<<"Ptr *DerivedPtr type name is "<<typeid(*DerivedPtr).name();
   if(typeid(*DerivedPtr) != typeid(Test))
      cout<<"\nPointer DerivedPtr is not a Test class type.\n";

   return 0;
}

c and f are different type.
int before double: 1
double before int: 0
class A before class B: 1
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