# include <stdio.h>

int main ( )
{
  int i;
  int n;

  printf ( "Enter N, the size of the array you want:" );
  scanf ( "%i", &n );
//
//  Although we normally put the declarations at the beginning of a program,
//  we are actually allowed to put them almost ANYWHERE, as long as they
//  occur before we first use the variable.
//
//  So we could declare "int a[10]" right here, even though we've already
//  done two executable statements, PRINTF and SCANF.
//
//  What is more interesting is that we can declare the array A to be of size
//  N, where the value of N has just been entered by the user.  
//
  int a[n];

  for ( i = 0; i < n; i++ )
  {
    a[i] = i * i;
  }
  
  printf ( "\n" );
  printf ( " I  A[I]\n" );
  printf ( "\n" );
  for ( i = 0; i < n; i++ )
  {
    printf ( "%2i  %4i\n", i, a[i] );
  }

  return 0;
}