#include <iostream>
#include <string>
using namespace std;

struct smartArray
 { 
   int *data;
   int size;
 };

void initialize(smartArray &a)
{
  a.data = NULL;
  a.size = 0;
}

void addElement(smartArray &a, int newElement)
{

  int *newData = new int[a.size+1];

  int i;
  for (i=0;i<a.size;i++) newData[i] = a.data[i];  

  newData[a.size] = newElement;

  delete[] a.data;
  a.data = newData;
  a.size++;
}

void printArray(smartArray &a)
{
  int i;
  for (i=0;i<a.size;i++) cout << a.data[i] << " ";
  cout << endl;
}


int main() 
{
   int input;
   smartArray a;
   initialize(a);

   do {
      cout << "Give me a number (or -1 to exit): ";
      cin >> input;
      if (input != -1) addElement(a,input);
   } while (input != -1);

   printArray(a);
   return 0;
}