//simple counter class
public class Tally {
  int tally;

  public Tally() {
    tally = 0;
  }

  public Tally(int num) {
    //start tally at 'num'
    tally = num;
  }

  public void incrTally(int num) {
    tally += num;
  }

  public void decrTally(int num) {
    tally -= num;
  }

  public int getTally() {
    return(tally); 
  }
}