What happens when you attempt to compile and run the following code?

What happens when you attempt to compile and run the following code?

#include

#include

using namespace std;

class A {

public:

A() { cout << "A no parameters";}

A(string s) { cout << "A string parameter";}

A(A &a) { cout << "A object A parameter";}

};

class B : public A {

public:

B() { cout << "B no parameters";}

B(string s) { cout << "B string parameter";}

};

int main () {

A a1;

A a2("Test");

B b1("Alan");

return 0;

}