/* Exercise 3.28 Solution */
#include <stdio.h>

void
main ()
{
  int passes = 0, failures = 0, student = 1, result;
   
  while (student <= 10) 
    {
      printf ("Enter result (1=pass, 2=fail): ");
      scanf ("%d", &result);
       
      while (result != 1 && result != 2) 
        {
          printf ("Invalid result\nEnter result (1=pass, 2=fail): ");
          scanf ("%d", &result);
        }
      
      if (result == 1)
        ++passes;
      else
        ++failures;
      
      ++student;
    }
   
  printf ("Passed %d\nFailed %d\n", passes, failures);
   
  if (passes >= 8)
    printf ("Raise tuition\n");
}