#ifndef __STUDENT_COMPARE__
#define __STUDENT_COMPARE__

/**
 * student-compare.h
 *   Some simple comparators for students.
 */

// +-------+----------------------------------------------------------
// | Notes |
// +-------+

/*
  All comparators return
  - a negative number, for "s precedes t"
  - zero, for "s equals t"
  - a positive numbe, for "s follows t"

  The names should make their purpose obvious.
 */


// +-------------+----------------------------------------------------
// | Comparators |
// +-------------+

int compare_students_by_debt (struct student *s, struct student *t);
int compare_students_by_gpa (struct student *s, struct student *t);
int compare_students_by_name (struct student *s, struct student *t);
int compare_students_by_student_id (struct student *s, struct student *t);

#endif // __STUDENT_COMPARE__