#include <iostream>

using namespace std;

const size_t SIZE_INCREMENT = 10; 

void PrintArray(const int * ary, size_t size);
void FillArray(int * ary, size_t  & size);
void GrowArray(int * & ary, size_t & size);

int main() {

    int * data = nullptr;
    size_t size = 0;

    data = new int[SIZE_INCREMENT];

    FillArray(data, size);

    cout << "The origional array" << endl;
    PrintArray(data, size);
    cout << endl;

    GrowArray(data, size);
    cout << "A bigger array" << endl;
    PrintArray(data, size);
    cout << endl;


    delete [] data;

    return 0;
}

void FillArray(int * ary, size_t  & size){
    size_t i;

    size = SIZE_INCREMENT;
    for(i=0; i<size;  i++) {
        ary[i] = 10+i;
    }

    return;
}

void PrintArray(const int * ary, size_t size){
    size_t i;

    for(i=0;i<size;i++) {
        cout << ary[i] << endl;
    }

    return;
}

// Grow Array
//  1. Allocate new memory (bigger)
//  2. Copy the data from the current memory to the new memory
//  3. Delete the old memory
//  4. Move the pointer to point at the new memory
//  5. Change the size
void GrowArray(int * & ary, size_t & size){

    int * tmp = nullptr;
    size_t i;

    tmp  = new  int[size+ SIZE_INCREMENT];

    for(i=0;i<size; i++) {
       tmp[i] = ary[i];
    }

    for(i=size;i<size+SIZE_INCREMENT; i++) {
       tmp[i] =  10 + i;
    }

    delete [] ary;

    ary = tmp;

    tmp = nullptr;

    size += SIZE_INCREMENT;

    return;
}