/**
 * Program Description: This program will calculate the average of a student over 3 
 * subjects and displays their grade
 * 
 * By Amro Qandour 
 * Date: 31.08.2006
 */
import javax.swing.JOptionPane ;
import java.text.DecimalFormat;
import javax.swing.*;
public class StudentGrades
{
    public static void main(String[]args)
    {  

        
        final int limit=3; 
        double avrg=0;
        double sum=0;
        double result=0;
        String doItAgain;
        
        
                    
        do 
    
        {   
            String lastName=JOptionPane.showInputDialog("Enter family name:");
            String firstName=JOptionPane.showInputDialog("Enter first name:"); 
            String firstUpper=firstName.toUpperCase();
            char ch;
            int index=0; 
            ch=firstUpper.charAt(0);          
            for (int count=1; count<=limit; count++)                                    
            {                                                              
                    String subject=JOptionPane.showInputDialog("Enter subject:");
                do    
                {    
                    String sResult=JOptionPane.showInputDialog("Enter result:");                                                
                    result=Double.parseDouble(sResult); 
                }    
                while (result<0 || result>100);      
                
                grade(result);               
                
                JOptionPane.showMessageDialog(null,"Result for" + " " + ch + "."  
                + " " + lastName + "\n" + subject + ":" + " " + grade(result));                                                  
                sum=sum + result;      
             }                                                   
                  
            DecimalFormat fmt= new DecimalFormat(".##");
            avrg=sum/3; 
            JOptionPane.showMessageDialog(null,"Average for" + " " + ch + "." + lastName 
            + " " + "is:" + "\n"  + fmt.format(avrg) );                        
            
            doItAgain=JOptionPane.showInputDialog("Another student (y/n)?");
        }    
        
        while (doItAgain.equalsIgnoreCase("y"));                
    
    
    }  
    
    public static String grade(double mark)
    {
       String message = "";
       if (mark > 0 && mark < 50) {
            message = "Fail";
       }
       if (mark >= 50 && mark < 60) {
            message = "Pass";
       }
       if (mark >=60 && mark < 70) {
            message = "Credit";
       }
       if (mark >=70 && mark < 80) {
            message = "Distinction";
       }
       if (mark >=80 && mark <= 100) {
            message = "High Distinction";
       }     
        return(message);                      
            
     
    } 

}