/*
** $Id: weirdcounter,v 1.2 2003/01/27 16:30:48 phf Exp $
**
** Copyright (c) 2003 by Peter H. Froehlich <phf@acm.org>.
** Freely distributable for educational purposes.
*/

#ifndef _CS14_WEIRDCOUNTER
#define _CS14_WEIRDCOUNTER

#include <stdexcept>
#include "counter"

namespace cs14 {

class WeirdCounter: public Counter {
  float x, y, z;
public:
  WeirdCounter( int k, int t ) throw (std::domain_error):
    x(k*2.5),y(t*1.6),z(0.0*(k+t))
  {
    if ( !((k < 0) and (0 < t)) ) {
      throw std::domain_error( "new" );
    }
  }
  int lower() const {
    return (int) (x / 2.5);
  }
  int upper() const {
    return (int) (y / 1.6);
  }
  int get() const {
    return (int) (z / 1.0);
  }
  void set( int m ) throw (std::domain_error) {
    if ( (((int)(x/2.5)) <= m) and (m <= ((int)(y/1.6))) ) {
      z = m / 1.0;
    }
    else {
      throw std::domain_error( "set" );
    }
  }
  void inc() throw (std::domain_error) {
    if (z < (y/1.6)) {
      z += 1.0; x += 0.1;
    }
    else {
      throw std::domain_error( "inc" );
    }
  }
  void dec() throw (std::domain_error) {
    if ((x/2.5) < z) {
      z -= 1.0; y -= 0.1;
    }
    else {
      throw std::domain_error( "dec" );
    }
  }

}; // WeirdCounter

} // namespace cs14

#endif /* _CS14_WEIRDCOUNTER */