// CSE 143, Winter 2009, Marty Stepp
// This program was written in class to test the stutter method.
//
import java.util.*;

public class Stutter {
    // This method accepts an array of integers as its parameter and returns
    // a new array containing two copies of each value from the parameter.
    // For example, when passed {2, -3, 7}, it returns {2, 2, -3, -3, 7, 7}.
    public static int[] stutter(int[] a) {
        int[] result = new int[a.length * 2];
        
        for (int i = 0; i < a.length; i++) {
            result[2 * i] = a[i];
            result[2 * i + 1] = a[i];
        }
        
        return result;
    }
    
    // tests the stutter method
    public static void main(String[] args) {
        int[] a = {4, 7, -2, 15, 6};
        int[] a2 = stutter(a);
        System.out.println(Arrays.toString(a2)); 
    }
}