/**
 * A simple model of a clock
 * 
 * @author CSC 142
 * 
 */
public class Clock {
	private int h, m, s;

	/**
	 * Adds 1 second to the current time
	 * 
	 * @return the clock object
	 */
	public Clock tick() {
		s++;
		if (s == 60) {
			m++;
			s = 0;
			if (m == 60) {
				h++;
				m = 0;
			}
		}
		return this;
	}

	/**
	 * Returns a string description of the clock
	 */
	public String toString() {
		return "h = " + h + ", m = " + m + ", s = " + s;
	}
}