/* Test of polymorphism as described in Gaddis */
/* Try this program with and without the word virtual in class A
   and explain what is happening
   and which is the least surprising
*/
#include <iostream>

using namespace std;

class A{
 public:
	// virtual 
		void doit(){ cout << "A:: doit();\n"; }

	void it()
	{ cout << "A:: it();\n";
	  doit(); /* which doit() is this?  is it A::doit() or B::doit()?*/
	}
};
class B: public A{
 public:
	void doit(){ cout << "B:: doit();\n"; }
};

int main()
{
	B b;
	b.doit();
	b.it(); /* uses A::it() */
		/* and if doit() is not virtual we get A::doit() not B::doit()*/
}