/**
     * This method asks a question and ranges checks the response.
     * The method will not terminate until an integer in the range
     * is given.
     * 
     * NOTE: this method ONLY accepts integer responses
     * (future dev: allow for other type response)
     * 
     * @author: Dave Slemon
     * 
     * @param c points to the canvas
     * @param question is the question prompt
     * @param low is the lowest allowed response
     * @param high is the highest allowed response
     * 
     * @return Returns the integer response to the question.
     */
    public int askQuestion( Console c, String question, int low, int high)
    {
        int result = 1;
        boolean ok = true;
        
        do {
            c.print(question + " (accepted range: " + low + " to " + high +")  > " );
            result = c.nextInt();
        
            ok = (result >= low) && (result <= high);
            
            // *** an error message shown for invalid responses
            if (!ok) {
             c.print("RANGE ERROR: " );   
            }
           
        } while ( !ok );
        
        return result;
    }