toy_robot

Toy Robot Simulator

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Description

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• 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, but must be

  prevented from falling to destruction. Any movement that would result in the

  robot falling from the table must be prevented, however further valid

  movement commands must still be allowed.

Create an application that can read in commands of the following form:

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) can be considered to be the SOUTH WEST most corner.

• The first valid command to the robot is a PLACE command, after that, any

  sequence of commands may be issued, in any order, including another PLACE

  command. The application should discard all commands in the sequence until

  a valid PLACE command has been executed.

• MOVE will move the toy robot one unit forward in the direction it is

  currently facing.

• LEFT and RIGHT will rotate the robot 90 degrees in the specified direction

  without changing the position of the robot.

• REPORT will announce the X,Y and F of the robot. This can be in any form,

  but standard output is sufficient.

• A robot that is not on the table can choose the ignore the MOVE, LEFT, RIGHT

  and REPORT commands.

• Input can be from a file, or from standard input, as the developer chooses.

• Provide test data to exercise the application.

Constraints

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• The toy robot must not fall off the table during movement. This also

  includes the initial placement of the toy robot.

• Any move that would cause the robot to fall must be ignored.

Example Input and Output

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Example a

PLACE 0,0,NORTH

MOVE

REPORT

Expected output:

0,1,NORTH

Example b

PLACE 0,0,NORTH

LEFT

REPORT

Expected output:

0,0,WEST

Example c

PLACE 1,2,EAST

MOVE

MOVE

LEFT

MOVE

REPORT

Expected output

3,3,NORTH

Deliverables

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Please provide your source code, and any test code/data you using in

developing your solution.

Please engineer your solution to a standard you consider suitable for

production. It is not required to provide any graphical output showing the

movement of the toy robot.