public class Gpa
{
   private int[]credits;
   private String[] grades;
   private int numCourses;
   private int maxCourses;

   public Gpa(int noCourses)
   {
      maxCourses = noCourses;
      numCourses = 0;
      credits = new int[maxCourses];
      grades = new String[maxCourses];
   }

   public void addCourse(int newCredits, String newGrade)
   {
      credits[numCourses] = newCredits;
      grades[numCourses] = newGrade;
      numCourses++;
   }

   public double calcGpa()
   {

   }