// CS2310 Project 4 Specification file

#define MAX_NAME_LENGTH 15
#define LEN_SSN 10

enum letRank {Freshment, Sofomore, Junior, Senior};
enum letGrade {A, B, C, D, F};

struct stuRecord {
  char fstName[MAX_NAME_LENGTH];
  char lstName[MAX_NAME_LENGTH];
  char ssn[LEN_SSN];
  letRank  rank;
  char letGrade;
  int  grades[3];
  stuRecord* link;
};

typedef stuRecord* StuRecPtr;

class LinkedStuRecords {
public:
  void InsertRecord(stuRecord& newRecord);
    // Precondition:
    //   A new student record is passed in by newRecord. The student
    //	 records in the list are sorted in lexicographic order by 
    //	 last names.
    // Postcondition:
    //   The new record is inserted into the list at the proper 
	//	 position. The resulting list is still ordered. 
  void CalLetGrade();
    // Postcondition:
    //   Go through the list, calculate the letter grade for each student
    //   by averaging the three numerical grades.
  void PrintByGrades() const;
    // Postcondition:
    //   Print out student records in lexicographic order by last names,
    //   with the records of 'A' first, 'B' the second, ..., 'F' the last.
  void PrintByRanks() const;
    // Postcondition:
    //   Print out student records in lexicographic order by last names,
	//	 with the records of 'Freshmen' first, 'sophomore' the second, 
	//	 'junior' the third, and 'senior' the last.
  LinkedStuRecords();
    // Default constructor.

private:
  StuRecPtr head; // Head pointer.
};