#include <iostream>
int*doubleSize(const int*, int);
int* reverseArray(int [], int);
int main()
{
    const int size = 3;
    int array [size];
    int* twice;
    int* reverse;
    std::cout <<"Enter" << size << "elements for the array";
    for(int j=0; j <size;j++)
    {
        std::cin >>array[j];
    }
    for(int i =0; i < size; i++)
    {
        std::cout << "Original array list:" <<" " <<array[i] << " ";
        std::cout <<std::endl;
    }

    twice = doubleSize(array,size);

    std::cout << "Duplicated array with list with zeros filled for the unused elements";
    for(int k=0; k < size*2;k++)
    {
        std::cout << "\n" << twice[k];
    }
    std::cout <<std::endl;

    reverse = reverseArray(array,size);
    std::cout << "Reversed array:";
    for(int l=0; l <size*2;l++)
    {
        std::cout << reverse[l];
    }


    return 0;
}
int* doubleSize(const int* array, int size)
{
    int* twice = new int[size*2];

    for(int i =0; i<size*2;i++)
    {
        if(i < size)
        {
            twice[i]= array[i];
        }
        else
            twice[i]=0;


    }



        return twice;

}
int* reverseArray(int array[],int size)
{
    int* newArray = new int[size*2];

    int j =0;
    for(int i = ((size*2)-1); i >=0; i--)
    {
        newArray[j] = array[i];
        j++;
    }
    return newArray;
}