import javax.swing.JOptionPane;
import java.lang.String;
import java.lang.Integer;

public class StudentAverage {
public static void studentAverage(int average)
{
	int number = average;
	
	if ( number >= 0 && number <=100)
		JOptionPane.showMessageDialog(null, "Point is: " + qualityPoints (number));
    //showStatus( "Point is: " + qualityPoints (number));
	else
		JOptionPane.showMessageDialog(null, "Invalid input");  
		//showStatus( "Invalid input");
}

public static int qualityPoints (int grade)
{
	if (grade >= 90)
		return 4;
	else if (grade >= 80)
		return 3;
	else if (grade >= 70)
		return 2;
	else if (grade >= 60)
		return 1;
	else
		return 0;		
}
	
public static void main(String[] args)
{
	//Enter the students average
String studentAverageString = JOptionPane.showInputDialog(null,
"Enter the Students Average: ", "Input", JOptionPane.QUESTION_MESSAGE);

		//Convert string to double
		int averageInt = Integer.parseInt (studentAverageString);
		
    studentAverage(averageInt);


}

}