# include <stdio.h>

int main ( )
{
  int g;
  int grade[100];
  int i;
  int n;
//
//  Read grades one by one.
//
//  For "technical reasons", it's easier to use a temporary variable
//  G with SCANF, and then transfer that value into the GRADE array.
//
//  We can't accept more than 100 grades because that's how much
//  space we set aside.
//
//  If the user enters a "-1", we stop reading grades.
//
//  To prove we know what is going on, once the user is done
//  entering data, we'll print it.
//
  n = 0;
  printf ( "Enter grades one at a time, or -1 when done\n" );

  while ( n < 100 )
  {
    scanf ( "%i", &g );

    if ( g == -1 )
    {
      break;
    }

    grade[n] = g;
    n = n + 1;
  }
//
// Print the data.
//
  printf ( "%d grades were entered.\n", n );

  for ( i = 0; i < n; i++ )
  {
    printf ( "%2i:  %2i\n", i, grade[i] );
  }

  return 0;
}