package grades;

/**
 * @author mlizarra
 *
 */


public class GradesService
{
      final int NUMSTUDENTS = 4;
      String[] students;
      char[] grade;

      public GradesService ( )
      {
          students = new String [] {"Mary", "Joe", "Sally", "Tim"};
          grade = new char [] {'A', 'B', 'C', 'D'};

      } // end constructor

      public char getStudentGrade (String student)
      {
          for (int i = 0; i < NUMSTUDENTS; i++)
          {
             if (student.equals(students[i])) return grade[i];
          }
          return 'Z';
      } // end getStudentGrade

      public String getStudent (int studentID)
      {
          return students[studentID];
      } // end getStudent

      public String[] getStudents ( )
      {
          return students;
      } // end getStudents

      public static void main(String[] args)
      {
          GradesService gs = new GradesService();
          for (int i = 0; i < gs.NUMSTUDENTS; i++)
          {
              System.out.println("Student:  " + gs.getStudent (i) +
                                 "\tGrade:  " + gs.getStudentGrade(gs.getStudent(i)));
          }

      } // end main
} // end class GradesService