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

int main(void) {

  /* The variable groups is uninitialized */
  int classes = 2, groups, students = 280;

  int average_pr_group = 0, average_pr_course = 0;

  average_pr_group = students / groups;
  average_pr_course = students / classes;

  printf("Classes: %d, Groups: %d, Students: %d \n", classes, groups, students);

  printf("There are %d students pr. group.\n", average_pr_group);
  printf("There are %d students pr. class.\n", average_pr_course);
  
  return EXIT_SUCCESS;
}