fparadas / toy_robot

ToyRobot

Implementing a toy robot in elixir!

Problem description

The application is a simulation of a toy robot moving on a square tabletop, of dimensions 5 units x 5 units. There are no other obstructions on the table surface. The robot is free to roam around the surface of the table. Any movement that would result in the robot falling from the table is prevented, however further valid movement commands are still allowed.

The application reads a file using a name passed in the command line, the following commands are valid:

PLACE X,Y,F
MOVE
LEFT
RIGHT
REPORT

• PLACE will put the toy robot on the table in position X,Y and facing NORTH SOUTH, EAST or WEST.
• The origin (0,0) is the SOUTHWEST most corner.
• All commands are ignored until a valid PLACE is made.
• MOVE will move the toy robot one unit forward in the direction it is currently facing.
• LEFT and RIGHT rotates the robot 90 degrees in the specified direction without changing the position of the robot.
• REPORT announces the X,Y and F of the robot.

Running

mix escript.build
toyrobot <filename>

A file holding a set of commands must be passed into the application

Examples

• commands.txt

PLACE 0,0,NORTH
MOVE
RIGHT
MOVE
LEFT
MOVE
REPORT

$ toyrobot commands.txt

Robot is currently at (1, 2) and it's facing NORTH

Reference

• The Toy Robot - Ryan Bigg