//------------------------------------------- 
// 
// A more interactive version of the antworld. 
// 
// Simon Parsons 
// February 8th 2007 
 
// 
// Include C++ library definitions
 
#include <iostream>
using namespace std;

//
// Declare variables
 
int x; // robot's x position
int y; // robot's y position
char c; // user's input
bool q; // does user want to quit?

//
// Declare methods
 
void displayPosition() 
{
  cout << "the ant is at location (";
  cout << x;
  cout << ",";
  cout << y;
  cout << ")\n";
}

void moveNorth() 
{
  cout << "moving North...\n";
  y = y + 1;
}

void moveSouth() 
{
  cout << "moving South...\n";
  y = y - 1;
}

void moveWest() 
{
  cout << "moving West...\n";
  x = x - 1;
}

void moveEast() 
{
  cout << "moving East...\n";
  x = x + 1;
}
 
//
// Define main method
 
int main() 
 
{
  x = 0;                // Set variables
  y = 0;
  q = false;

  while ( q==false )    // We keep doing this bit 
 
  { 
 
   // Get input from user 

   cout << "Which way should the ant move (enter N,S,E,W or Q)? ";
   cin  >> c;
   cout << "You entered: ";
   cout << c;
   cout << "\n"; 
 
   // Depending on what the user entered, move the right way 

   if ( c=='N' ) 
   {
     moveNorth();
     displayPosition();
   } 

   if ( c=='S' ) 
   {
     moveSouth();
     displayPosition();
   }
 
   if ( c=='E' ) 
   {
     moveEast();
     displayPosition();
   }
 
   if ( c=='W' ) 
   {
     moveWest();
     displayPosition();
   }
 
   // If the user entered Q, set up so that we finish. 
 
   if ( c=='Q' ) 
   {
     q = true;
   }
  }
 
  cout << "Time to go!";
  return 0;
}