Relationship between base class and derived class

#include<iostream>
#include<vector>

class Account
{
public:

    virtual void PrintBalance()
    {
        std::cout<<"Base"<<std::endl;
    }
};

class SavingAccount
    : public Account
{
public:
   void PrintBalance()
   {
       std::cout<<"SavingAccount"<<std::endl;
   }
};



int main()
{
    1)Account* p = new SavingAccount();
    p->PrintBalance();

    2)Account* p1 = new Account();
    p1->PrintBalance();

    3)SavingAccount *p3 = new Account();
    p3->PrintBalance();

    4)SavingAccount* p4 = new SavingAccount();
    p4->PrintBalance();

    return 0;
};