import java.util.Random;

public class SnippyMain {

	public static void main(String args[]){

		System.out.println("Hello World");
		SnippyMain snippy =  new SnippyMain();

		String who = "";

		while(true)
		{
			who = snippy.getName();

			//exercise 1
			if(who != null && who.equals("Mary")){
				System.out.println("It's none other than Mary");
				break;
    			}
			else{
				System.out.println("It's " + who + "!");
			}
		}

		System.out.println("Should have found Mary");

		int a = 0;
		int b;

		a = 2;
		b = 3;
		//Exercise 2
		System.out.println("2 + 3 equals " + snippy.add(a,b).toString());
		System.out.println("Should be 5");

		//Exercise 3
		System.out.println("My value is at " + snippy.findIndex(new int[]{0,1,2,3,4,5}, 5, 3));
		System.out.println("Should be 3");

		//Exercise 4
		System.out.println("The largest value is" + snippy.getLargest(new int[]{4, 0, 20,2,3,4}, 5).toString());
		System.out.println("Should be 20");
	}

	public String getName(){

		String[] names = {null, "Joe", "Mary", "John", "David", null};

		Random random = new Random();

		return names[ Math.abs(random.nextInt()) % 4 ];

	}

	public Integer add(int a, int b){
		return a + b;
	}


	public int findIndex(int[] elements, int maxIndex, int target){

		int i = 0;

		while(elements[i] != target && i < maxIndex ){
			i++;
		}

		return i;
	}

	public Integer getLargest(int[] elements, int size){

		int largest = -1;

		for(int i = 0; i < size; i++){
			if(largest < elements[i]){
				largest = elements[i];
			}
		}

		return largest;
	}
}