import java.util.*;
	import java.text.*;
	
    public class Student
   {
		public int classYear;
		private double gpa = 0;
		public String major;
		
		//to calculate gra
		private int credits = 0;
		private double gpaSum = 0;
		
		/*getMajor
		Input: none
		Return: major*/
		public String getMajor()
		{
			return major;
		}
		
		/*increaseYear
		Input: none
		Description: increase student year by one
		Return: none*/
		public void increaseYear()
		{
			if (classYear < 4)
				classYear++;
		}
		
		/*calcGpa
		Input: grade(double)
		Description: update credits and gpaSum calculate GPA
		Return: none*/
		public void calcGpa(double grade)
		{
			credits++;
			//increase number of credits
			gpaSum = gpaSum + grade;
			gpa = gpaSum / credits;
		}
			
		/*printData
		Input: noe
		Description: print instance variables
		Return: none*/
		public void printData()
		{
			DecimalFormat df = new DecimalFormat("0.00");
		 
			System.out.println("Major: " + major +
								"\nClass year: " + classYear +
								"\nGPA: " + df.format(gpa));
		}						
		
   }