import java.io.StreamTokenizer;


interface Transformation {

    /**
     * Reads in the required arguments for this Transformation via the
     * StreamTokenizer, <code>s</code>. 
     *
     * @param s          The StreamTokenizer from which this Transformation
     *                   will collect it's required arguments (if any).
     */
    void readArgs( StreamTokenizer s );
    

    /**
     * Performs this Transformation's particular operation on <code>args
     * </code>.
     * <p>
     * <dl>
     * <dd><b>Note:</b>
     * <dt><code>args</code> is a reference to a float array, which means that,
     *     although the reference to the array cannot be modified, the floats
     *     in the array can and are modified by this operation. It is for this
     *     reason that there is no return type to the <code>transform()</code>
     *     operation.
     * </dl>
     *
     * @param args       The inputs to this Transformation's operation. The
     *                   elements of <code>arg</code> are modified by this 
     *                   operation.
     */
    void transform( float[] args );


    /**
     * Returns information regarding the usage of this particular 
     * Transformation to the standard output.
     *
     */
    void help();

}