I’m a 3rd semester student who is struggling with object oriented programming as our teacher is not helpful in elaborating his lectures.

This is the main cpp

#include "bank.h"
#include<iostream>
using namespace std;

bonk objeExpansion(bonk& obj, int i)
{
    bonk* obj2 = new bonk[i];
    for (int j = 0; j < i-1; j++)
    {
        obj2[j] = obj[j];
    }
}
int main()
{
    int i = 0;
    bonk* obj = new bonk[0];

    while (true)
    {
        cout << "What do you want to enter do:n1.Add Usern2.View Usern3.Exit";
        int* inp = new int{ -1 };
        cin >> *inp;
        if (*inp == 1)
        {
            
            i++;
            system("pause");
            int* acnum = new int{ 0 };
            float* bal = new float{ 0 };
            char* nm = new char[25]{};
            cout << "Enter Name: ";
            cin.getline(nm, 25);
            cout << "Enter Account num: ";
            cin >> *acnum;
            cout << "Enter balance: ";
            cin >> *bal;
        }
        else if (*inp == 2)
        {
            if (i > 0)
            {
                cout << "We currently have these Unlucky People in our database:n";
                for (int j = 0; j < i; j++)
                {
                    cout << *(obj[i].getName());
                }
            }
            else
            {
                cout << "There is no one in the DB rn. Sad :(n";
            }

        }
        else
        {
            delete inp;
            break;
        }
        system("pause");
    }


    return 0;
}

This is the header cpp:

#include "bank.h"
#include "iostream"
using namespace std;
bonk::bonk()
{
    accNum = 0;
    balance = 0;
    HoldersName = NULL;
}
bonk::~bonk()
{
delete[] HoldersName;
}
char* bonk:: getName()
{
    return HoldersName;
}

This is the header file:

#ifndef rectangle_h
#define rectangle_h

class bonk {

private:
    int accNum;
    float balance;
    char* HoldersName = new char[25]{};
public:
    bonk();
    ~bonk();
    char* getName();
};

#endif

I was expecting the program to create a bank account (initialize an object with header and then editing that later on but I guess I cant clear out the basic issues to at least make my code run. I was also expecting the objects to expand as I would be making them dynamically increase in size to insure proper need based memory optimization.

my files order just in case