/**
  * Copyright (c): Uwe Schmidt, FH Wedel
  *
  * You may study, modify and distribute this source code
  * FOR NON-COMMERCIAL PURPOSES ONLY.
  * This copyright message has to remain unchanged.
  *
  * Note that this document is provided 'as is',
  * WITHOUT WARRANTY of any kind either expressed or implied.
  */

/**
  * class for constructing
  * a function by scaling a given function f
  * g(x) = c * f(x)"
  */

//--------------------

public
class ScaleFunction
  implements RealFunction
{
  private
  double c;

  private
  RealFunction f;

  public
  ScaleFunction(double c, RealFunction f) {
    this.c = c;
    this.f = f;
  }

  public
  double at(double x) {
    return
      c * f.at(x);
  }

  public
  String toString() {
    return
      "" + c + "*" + f.toString();
  }
}

//--------------------