//----------------------------------------------------------------------
//
// roombaCommand.cpp
//
// This program simulates a robot wandering around a room where the robot
// is controlled by commands loaded from a file.
//
// Written by:  Elizabeth Sklar
// Modified by: Simon Parsons
//
// Last modified: 4th October

#include <iostream>
#include <fstream>

using namespace std;

int main() 
{
  // Set up input stream.

  ifstream myInput;

  // 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;

  // Open file --- I'll use the one generated by roombaLog.cpp

  myInput.open("log.txt");
  myInput  >> c;

  // Loop until user enters Q to quit or we reach the end of the file.

  while ( q==false && ! myInput.eof()) {

    cout << "the roomba is at location (" << x << "," << y << ")" << endl;
    cout << "reading a command from the file" << endl;
    cout << "the command is: " << 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' ) || ( c == 'q' )) {
      q = true;
    }
    else {
      cout << "Oops! you entered something invalid. please try again :-)" << endl;
    }


    // Read the next input

    myInput >> c;

  } // end while

  // Close the file

  myInput.close();

} // end of main()