// Marty Stepp, CSE 142, Spring 2010
// This program plays a simple "lotto" game that draws up to ten lottery numbers,
// each from 1-30.  If it gets a lucky 7, it stops.
// The method returns true/false based on whether it found a 7 or not.
// The purpose of this program is to practice methods with loops that return.

import java.util.*;

public class LuckySeven {
    public static void main(String[] args) {
        Random rand = new Random();
        
        // play 3 rounds of lotto
        seven(rand);
        System.out.println();

        seven(rand);
        System.out.println();

        seven(rand);
        System.out.println();
    }

    // Draws 10 lotto numbers 1-30; returns true if one is 7.
    // 15 29 18 29 11 3 30 17 19 22   (first call)
    // 29 5 29 4 7                    (second call)

    public static boolean seven(Random rand) {
        for (int i = 1; i <= 10; i++) {
            int lotto = rand.nextInt(20) + 1;
            System.out.print(lotto + " ");
            if (lotto == 7) {
                return true;
            }
        }

        return false;
    }
}