import java.util.Scanner;

/**
 * This main program reads in at most 6 student grades
 * and then returns the average grade.
 *
 * @author YOUR NAME
 * @version 1.00
 */
public class q2
{
   public static void main(String[] args)
   { //main
        int maxScores = 6;
        int[] grades = new int[maxScores];
        int mark;
        int i=0;
        int numScores=0;
        Scanner keyb = new Scanner(System.in);
        String tempMark = "";
        int numMarks = 0;
        
        i=0;
        while (true)
        { //w
            System.out.print("Enter a mark (e.g 50 or Q to quit) > ");
            tempMark = keyb.nextLine();
            if (tempMark.length() > 0 && tempMark.toUpperCase().substring(0,1).equals("Q")) break;
            
            try {
                mark = Integer.parseInt(tempMark);
            } catch (Exception e) {
                System.out.println("Error with input: please re-enter");
                continue;
            }
            
            
            if (mark < 0 || mark > 100) {
                System.out.println("Error out-of-range: please re-enter");
                continue;
            }
            
            
            
            grades[i] = mark;
            numScores = numScores + 1;
            i = i + 1;
            
            if (numScores >= maxScores) break;
        } //w
        
        
        System.out.println(numScores + " student test scores have been read in.");
        System.out.println("The averages grade was " + averageGrade(grades, numScores));
        
   } //main
   
   
   
   
   public static double averageGrade(int[] grades, int number)
   {
       int sum = 0;
       for(int x=0; x< number; x++)
          sum = sum + grades[x];
          
       if (number == 0)
          return 0.0;
       
       return (double) sum / number;
   }
    
    

}