TypeCasting

static_cast3

#include <iostream>
using namespace std;

class Base_Class {
public:
	virtual void func() {}
};

class Derived_Class :public Base_Class {
public:
	void func() {}
};

int main() {
	Base_Class * a = new Base_Class();
	Derived_Class *b = static_cast<Derived_Class*>(a);
	if (!b) cout << "b is nullptr";
        else cout << "b is not nullptr";
	cin.get();
}