/**
   roomba.cpp
   22-feb-2009/sklar
   
   this program simulates a robot wandering around a room.
  
*/


#include <iostream>
using namespace std;


/**
 * main function
 *
 */
int main() {

  // 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?

  // initialize variables
  x = 0;
  y = 0;
  q = false;

  // loop until user enters Q to quit
  while ( q==false ) {
    cout << "the roomba is at location (" << x << "," << y << ")\n";
    cout << "which way should roomba move (enter F,B,L,R or Q)? ";
    cin >> c;
    cout << "you entered: " << c << "\n";
    if ( c=='F' ) {
      y = y + 1;
    }
    else if ( c=='B' ) {
      y = y - 1;
    }
    else if ( c=='L' ) {
      x = x - 1;
    }
    else if ( c=='R' ) {
      x = x + 1;
    }
    else if ( c=='Q' ) {
      q = true;
    }
    else {
      cout << "oops! you entered something invalid. please try again :-)\n";
    }
  } // end while q==false 

} // end of main()