C++: Static and dynamic cast

dynamic_cast.cpp

#include <iostream>

using namespace std;

class Base {
public:
    virtual void print() {
        cout << "in base" << endl;
    }
    
    virtual ~Base() {
        cout << "Boom destructed" << endl;
    }
};

class Derived1 : public Base {
public:
    int var1 = 1;
    virtual void print() {
        cout << "1" << endl;
    }
};

class Derived2 : public Base {
public:
    int var1 = 2;
    virtual void print() {
        cout << "2" << endl;
    }
};

dyncast_down_cast.cpp

Derived1 *d1p1 = dynamic_cast<Derived1 *>(bp1);

dyncast_null_check.cpp

if(d1p1 != NULL) {
    d1p1->print();
} else {
    cout << "Couldn't cast" << endl;
}

dyncast_up_cast.cpp

Base b;
Derived1 d1;
Base *bp1 = dynamic_cast<Base *>(&d1);