//**************************************************************
//                                                                    
//  Class:			Train class (Labtest2, Tuesday, 2:30)                 
//                                                                     
//  Authors:		Art Miller		amiller@mta.ca
//					Bob Rosebrugh	rrosebrugh@mta.ca
//                                                                    
//  Description:	A class for Train objects
//						
//		METHODS:
//		Train				a constructor 
//		moveForward			move in easterly direction (forward)
//		moveBackward		move in westerly direction (backward)
//		hasArrived			has the train reached final destination ?
//		displayLocation		display the current location of the train
//
//  Date:			November 16, 1999 
//
//  Course Info:	CS 1711, Lab test2 Tuesday, 2:30 - 4:00
//
//  Filename:		train.h 



// the Train class
class Train
{
	private:
		int tripDistance;     // distance to travel to destination
		int location;			// current distance
	public:
		// constructor
		Train();

		// modify distance (adding to or subtracting from current location)
		void moveForward(int distance); 
		void moveBackward(int distance); 

		// test if reached final destination
		bool hasArrived();

		// display the current loction
		void displayPosition();
};

// ***********************************************************
//      Train class implementation
// ***********************************************************

     // constructor
	Train::Train()
	{
		location = 0; tripDistance = 100;
	}

	void Train::moveForward(int distance)  // move east from start point
	{
		location = location + distance;
		if (location >= tripDistance)
			location = tripDistance;
	}

	void Train::moveBackward(int distance) // move west from start point
	{
		location = location - distance; 	
	}
	
	bool Train::hasArrived()
	{
		return (location >= tripDistance);
	}

	void Train::displayPosition()
	{
		if (location >= tripDistance)
			cout << "The train has arrived!" << endl;
		else
			cout << "Location = " << location << endl;
	}