// Helene Martin, CSE 142
// Examples of passing arrays as parameters and returning them from methods

import java.util.*;

public class ArrayExamples {
	public static void main(String[] args) {
		int[] vals = {6, 2, 4, 5};
		System.out.println(sum(vals));
		
		int[] vals2 = {5, 23, 7, 56};
		
		int[] merged = merge(vals, vals2);
		System.out.println(Arrays.toString(merged)); 
	}
	
	// takes in two arrays of integers
	// returns a new array containing elements from the first array 
	// followed by elements from second
	public static int[] merge(int[] a1, int[] a2) {
		int[] merged = new int[a1.length + a2.length];
		
		for (int i = 0; i < a1.length; i++) {
			merged[i] = a1[i];
		}
		
		for (int i = 0; i < a2.length; i++) {
			merged[a1.length + i] = a2[i];
		}
		
		return merged;
	}
	
	// takes in an array of integers
	// returns the sum of all its values
	public static int sum(int[] values) {
		int total = 0;
		for (int i = 0; i < values.length; i++) {
			total += values[i];
		}
		return total;
	}
}