/* Input numbers into an array and calculate their avarage.
   An example to illustrate the case where the size of  the 
   array is not declared in advance. */

import java.io.*;

class ArrayEx2 {

    public static void main(String[] args) throws IOException {
 
        BufferedReader stdin;
        stdin = new BufferedReader (new InputStreamReader (System.in));

	int sizeOfArray;
	int sum = 0;
	double avarage;
		
	System.out.print ("Enter the number of entrees? ");
        System.out.flush();
	sizeOfArray = Integer.parseInt(stdin.readLine());
		
	// declare the array
	int[] numbers = new int[sizeOfArray];
		
	// input numbers into the array

	for (int index=0; index != sizeOfArray; index++) {
		
	    System.out.print("Enter entry #" + index + ":   "); 
            System.out.flush();
	    numbers[index] = Integer.parseInt(stdin.readLine());
	}

	// calculate the sum of the numbers in the array
	for (int index=0; index != sizeOfArray; index++)
	    sum = sum + numbers[index];

	// calculate the avarage of the numbers
	avarage = (double)sum/(double)sizeOfArray;
		
        System.out.println("The avarage of the numbers in the array is " + avarage);
    }
}