// CS 101 Assignment 7   -- Lab Problem: HurdleWorld

...

// Example of using a global variable.  To be AVOIDED!
class Hurdler extends Buggle {

    int n;                 // n is declared as a global variable (BAD)
        
  public int runHurdles() {
    // run all hurdles and stop at the opposite wall

      if (atFinishLine()) {
          // do nothing    // should return 0
      } else if (isFacingWall()) {
          jumpHurdle();
          n = n+1;         // note that n has not been initialized 
          runHurdles();    // note that runHurdles() is not called here as a function
      } else {
          forward();
          runHurdles();    // runHurdles() is not called here as a function
      }
      return n;            // n may not have been initialized
  }

...     

} // end of class Hurdler