//------------------------------------------------------
//
// roomba.cpp
//
// A small robot simulation program, which describes the 
// behavior of a simple roomba-like robot.
//
// Written by: Simon Parsons
// 2nd September 2008
//
//------------------------------------------------------

// C++ library definitions

#include <iostream>
using namespace std;

// Variables

int x;  // The roomba's x co-ordinate
int y;  // The roomba's y co-ordinate;

// Methods

void displayPosition()
{
    cout << "Roomba is at: (";
    cout << x << ", " << y;
    cout << ")\n";
}

void goNorth()
{
    cout << "Moving north\n";
    y = y + 1;
}

void goSouth()
{
    cout << "Moving south\n";
    y = y - 1;
}

void goEast()
{
    cout << "Moving east\n";
    x = x + 1;
}

void goWest()
{
    cout << "Moving west\n";
    x = x - 1;
}

int main()
{

    cout << "Hello from your living room\n";

    // initial position.

    x = 4;
    y = 3;

    displayPosition();
    goNorth();
    displayPosition();

 return 0;
}