#include <stdlib.h>
#include <stdio.h>

/* Returns a pointer to the data */
/* itemsRead is set by reference to #items read */
int * getInts( int * itemsRead )
{
  int numRead = 0, arraySize = 5, inputVal;
  int *array = malloc( sizeof( int ) * arraySize );

  if( array == NULL )
    return NULL;

  printf( "Enter any number of integers: " );

  while( scanf( "%d", &inputVal ) == 1 )
  {
    if( numRead == arraySize )
    {      /* Array doubling code */
      arraySize *= 2;
      array = realloc( array, sizeof( int ) * arraySize );
      if( array == NULL )
        return NULL;
    }
    array[ numRead++ ] = inputVal;
  }

  *itemsRead = numRead;
  return realloc( array, sizeof( int ) * numRead );
}

void print1( int arr[], int n )
{
  int i;
  for( i = 0; i < n; i++ )
    printf( "%d ", arr[ i ] );
  printf( "\n" );
}

void print2( int arr[], int n )
{
  int *endMarker = arr + n;
  int *p = arr;

  while( p != endMarker )
    printf( "%d ", *p++ );
  printf( "\n" );
}

int main( void )
{
  int numItems;
  int *arr;

  arr = getInts( &numItems );
  print1( arr, numItems );
  print2( arr, numItems );
}