/**
 * Matt Kretchmar
 * February 7, 2006
 * NYC.java
 * This program allows the user to enter direction command (N,S,E,W) to
 * move a person around in New York City.  The program keeps track of
 * how far the person has moved from their starting point and reports
 * the information back to the user at the end of input.  A 'Q' signifies
 * the end of input.  
 */

import java.util.Scanner;

class NYC
{
    public static void main ( String [] args )
    {
        char code;          // User's input code
        String s;           // to help reading a character
        int blocksNorth;    // number of blocks north from starting point
        int blocksEast;     // number of blocks East from starting point

        Scanner keyboard = new Scanner(System.in);
        
        code = ' ';
        blocksNorth = 0;
        blocksEast = 0;
        
        
        while ( code != 'Q' )
        {
            System.out.println("Enter direction code (N,E,S,W, or Quit): ");
            s = keyboard.next();
            code = s.charAt(0);
            
            switch (code)
            {
                case 'N' : blocksNorth++;
                           break;
                case 'S' : blocksNorth--;
                           break;
                case 'E' : blocksEast++;
                           break;
                case 'W' : blocksEast--;
                           break;
                case 'Q' : break;
                default :  System.out.println("ignoring invalid input");
            }
        }
        
        if ( blocksNorth == 0 && blocksEast == 0 )
            System.out.println("You are back at the starting point");
        else 
        {
            String sNorth;
            if ( blocksNorth == 0 )
                sNorth = "";
            else if (blocksNorth < 0 )
                sNorth = (-1 *blocksNorth) + " blocks South";
            else 
                sNorth = blocksNorth + " blocks North";
            
            String sEast;
            if ( blocksEast == 0 )
                sEast = "";
            else if (blocksEast < 0 )
                sEast = (-1*blocksEast) + " blocks West";
            else 
                sEast = blocksEast + " blocks East";
            
            String junction = "";
            if ( blocksNorth != 0 && blocksEast != 0 )
                junction = " and ";
            
            System.out.println("You are " + sNorth + junction + sEast + " of your starting point");
        }
    }
}