import java.util.Arrays;
import java.util.Random;


public class Debugging {
	
	public static int computeSum( int arrayOfIntegers[]){
		int sum = 0;
		int i = 0;
		while(i < arrayOfIntegers.length-1 );{ 
			sum += arrayOfIntegers[++i]; 
		}
		return sum;
	}
	
	public static double computeAverage( int arrayOfIntegers[]){
		double sum = computeSum(arrayOfIntegers);
		return sum / arrayOfIntegers.length;
	}
	
	public static void populateArray(int[] array){
		Random randomGen = new Random();
		for( int i = 0; i <=  array.length; ++i ){ 
			array[i] = randomGen.nextInt() % 100;
		}
	}
	
	public static void main(String[] args) {
		int arrayInts[] = new int[4];
		populateArray( arrayInts );
		double average = computeAverage(arrayInts);
		
		System.out.println(average);
		System.out.println(Arrays.toString(arrayInts));
	}

}