in C++ // praphrase or change this code , while the purpose and output is same

in C++ // praphrase or change this code , while the purpose and output is same  . 

#include <iostream>
#include <stdint.h>
using namespace std;

class arr{
private:
    int size_arr;            //To store the size of the array
    char *begin;             //Pointer for dynamic allocation of memory
    int capacity;            //To store the capacity of the elements in the array
public:
    arr(int n);              //constructor (default) for creating an array
    int insert_arr(char x);  //To insert an element x in the array
    int remov_arr(int i);    //To remove an element from position i
    void display();
    void displayAtPos(int i);//Function to display a character at position i
};

arr::arr(int n){
    size_arr = n;
    begin = new char[size_arr];
    capacity = 0;
}

int arr::insert_arr(const char x){
    if(capacity >= size_arr){
        cout << "Array Full!" << endl;
        return -1;
    }
    begin[capacity++] = x;            //One element is added, so increment the capacity by one.
    return 0;
}   

int arr::remov_arr(int i){
    if(capacity == 0){
        cout << "Nothing to delete " << endl;
        return -1;
    }
    if(capacity < i || i < 0){
        cout << "Out of bound" << endl;
        return -1;
    }
    if(capacity == 1){
        begin[capacity] = '\0';
        capacity--;
        return 0;
    }
    for(int j = i;j < capacity;j++){
        begin[j] = begin[j+1];      //Shift each element towards one place before
    }
    begin[capacity]  = '\0';        //change the duplicate character in the end to a null character.
    capacity--;                     //One element is removed, so decrement the capacity by one.

return 0;
}

void arr::display(void){
    for(int i = 0;i < capacity;i++){
        cout << begin[i];
    }
    cout << endl;
}

void arr::displayAtPos(int i){
    if(begin[i] == '\0') 
        cout << "Null character\n";
    else{
        cout << begin[i] << endl;
    }
}

int main()
{
    int n;
    arr obj1(26);
    obj1.insert_arr('A');
    obj1.insert_arr('B');
    obj1.insert_arr('C');
    obj1.insert_arr('D');
    obj1.insert_arr('E');
    obj1.insert_arr('F');
    obj1.insert_arr('G');
    obj1.insert_arr('H');
    obj1.insert_arr('I');
    obj1.insert_arr('J');
    obj1.insert_arr('K');
    obj1.insert_arr('L');
    obj1.insert_arr('M');
    obj1.insert_arr('N');
    obj1.insert_arr('O');
    obj1.insert_arr('P');
    obj1.insert_arr('Q');
    obj1.insert_arr('R');
    obj1.insert_arr('S');
    obj1.insert_arr('T');
    obj1.insert_arr('U');
    obj1.insert_arr('V');
    obj1.insert_arr('W');
    obj1.insert_arr('X');
    obj1.insert_arr('Y');
    obj1.insert_arr('Z');
    
    obj1.display();
    cout << "Enter element number to be erased(0 to 25) :";
    cin >> n;
    obj1.remov_arr(n);
    cout << "After Removing item at position " << n << " :" << endl;
    obj1.display();
    cout << "Data at last element is :";
    obj1.displayAtPos(25);
    return 0;
}