import javax.swing.JOptionPane;

public class FareCalc {
   public static void main(String[] args) {

   double fare = 0;
   double x = 0;
   double y = 0;
   double totalDistance = 0;
   boolean exitVar = false;
   double userDistance =0;
   String userDir ="";
   while(exitVar == false){
      userDir = JOptionPane.showInputDialog(null, "Please enter the direction you went. e.g. west\nor type 'exit' to exit. ");

   if (userDir.equals("exit")){
   exitVar = true;
   }
   else if ((!userDir.equals("south")) && (!userDir.equals("north")) && (!userDir.equals("east")) && (!userDir.equals("west"))){
   JOptionPane.showMessageDialog(null, "Error: please try again.");
   }
   else{
   userDistance = Double.parseDouble(JOptionPane.showInputDialog(null, "Please enter your distance. e.g. 0.5\nor type 'exit' to exit. "));
   }
   if (userDir.equals("north")){
   y = y+(userDistance);
   totalDistance = (totalDistance) + (userDistance);
   }
   else if (userDir.equals("south")){
   y = y-(userDistance);
   totalDistance = (totalDistance) + (userDistance);
   }
   else if (userDir.equals("east")){
   x = x+(userDistance);
   totalDistance = (totalDistance) + (userDistance);
   }
   else if (userDir.equals("west")){
   x = x-(userDistance);
   totalDistance = (totalDistance) + (userDistance);
   }
  }
   fare = 5+(8*totalDistance);
   JOptionPane.showMessageDialog(null, "You travelled a total of: " + totalDistance +" miles."+ "\nYou owe a total fare of: " + fare +" ."+ "\nYour final coordinates are: "+ "(" + x + "," + y+ ")"+".");
   }
  }