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Coding Test - Simulate a robot

Write a program that simulates the movements of a robot. The robot can have three possible movements:

turn right
turn left
advance

The robot is placed on a hypothetical infinite grid, facing a particular direction (north, east, south, or west) at a set of {x,y} coordinates, e.g., {3,8}, with coordinates increasing to the north and east.

Requirements

  • Create a Class Robot that exposes a method execute which given a number of instructions will calculate the robot's new coordinates, and the direction in which it is facing.
  • The argument of the execute method is a string in the format X Y BEARING COMMANDS.
  • The method should return a one-liner string in the format X Y BEARING.
  • Provide instructions to demonstrate the program works as required

Example

The letter-string RAALAL means:

Turn right
Advance twice
Turn left
Advance once
Turn left yet again

Say a robot starts at {7, 3} facing north. Running this stream of instructions should leave it at {9, 4} facing west.

In the example above, the arguments for execute would be 7 3 NORTH RAALAL, and the method should return 9 4 WEST.