What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
class A
{
   public: 
	virtual static void show(){
		cout<<"class A\n";
	}
};
 
class B: public A
{
   public:
	static void show(){
		cout<<"class B\n";
	}
};
 
int main(int argc, char const *argv[])
{
	A *a = new A();
	B b;
	a = &b;
	a->show();
	return 0;
}