Array Push & POP at given index

#include<iostream>
using namespace std;

int main()
{
    int n,i,newIndex,newInput,temp,choice;
    cout << "Insert Array size: ";
    cin >> n;
    int *num=new int[n];
    cout << "Insert Array Elements...." <<endl;
    for(i=0; i<n; i++)
    {
        cin >> num[i];
    }
    cout << "For PUSH press 1 & For POP press 2"<<endl;
    cout << "Choise: ";
    cin >> choice;
    if(choice == 1)
    {
        num[n+1];
        cout << "Input at which index new Data PUSH: ";
        cin >> newIndex;
        cout << "Input New element: ";
        cin >> newInput;
        for(i=n+1; i!=newIndex; i--)
            {
                num[i+1] = num[i];
            }
        temp = num[newIndex];
        num[newIndex] = newInput;
        num[newIndex+1] = temp;
        cout << "New Array is....." <<endl;
        for(i=0; i<n+1; i++)
        {
            cout << num[i] <<endl;
        }
    }
    else if(choice == 2)
    {
        cout << "Input at which index new Data POP: ";
        cin >> newIndex;
        for(i=newIndex; i<n; i++)
        {
            num[i] = num[i+1];
        }
        num[n-1];
        cout << "New Array is....." <<endl;
        for(i=0; i<n-1; i++)
        {
            cout << num[i] <<endl;
        }
    }

    return 0;

}