13_04.cpp

#include <bits/stdc++.h>
using namespace std;

class A {	// must be virtual to cast
public:
	virtual ~A() {	}
};
class B: public A {};
class C: public A {};
class D {};

void dynamic_cast_test() {
	// Run time conversion using RTTI
	A* a_from_b = new B();

	// No problem. Valid conversion
	B* b = dynamic_cast<B*>(a_from_b);
	cout<<b<<"\n";

	// Wrong conversion, pointer = nullptr
	C* c = dynamic_cast<C*>(a_from_b);
	cout<<c<<"\n";

	// Wrong conversion, pointer = nullptr
	D* d = dynamic_cast<D*>(a_from_b);
	cout<<d<<"\n";
}

void static_cast_test() {
	// Compile time check/cast
	A* a_from_b = new B();

	// No problem. Valid conversion
	B* b = static_cast<B*>(a_from_b);
	cout<<b<<"\n";

	// Wrong conversion, but u get pointer :(
	C* c = static_cast<C*>(a_from_b);
	cout<<c<<"\n";

	// Compilation error can be caught for such clear case
	//D* d = static_cast<D*>(a_from_b);
}



int main() {
	dynamic_cast_test();

	return 0;
}