#include<iostream>

using namespace std;

int * arrExpand(int*, int );
int * arrShift(int*, int);
void printArr(int*, int);

int main(){
    int *firstArr, *secArr, *arr, arrSize;

    cout<<"What is the size of the array? ";
    cin >> arrSize;

    for(int i = 0; i < arrSize; i++){
        cout<<"Enter element #" << i+1<< ": ";
        cin>>arr[i];
    }

    firstArr = arrExpand(arr, arrSize);
    secArr = arrShift(arr, arrSize);

    printArr(firstArr, (arrSize * 2));

    printArr(secArr, (arrSize + 1));



    delete [] arr;
}

int * arrExpand(int *arr, int arrSize){

    int *newArr = new int [arrSize * 2];

    if(newArr == NULL)
        cout<<"No more memory"<<endl;

    for(int i = 0; i < arrSize; i++){
        newArr[i] = arr[i];
    }

    for(int j = arrSize; j < (arrSize * 2); j++){
        newArr[j] = 0;
    }

    return newArr;
}

int * arrShift(int *arr, int arrSize){

    int *newArr = new int [arrSize + 1];

    newArr[0] = 0;
    for(int i = 1; i < (arrSize + 1); i++){
        newArr[i] = arr[i-1];
    }
    return newArr;
}

void printArr(int *arr, int size){
    for(int i = 0; i < size; i++)
        cout << arr[i] << " ";
}