The surface of Mars can be modelled by a rectangular grid around which robots are able to move according to instructions provided from Earth. Write a program that determines each sequence of robot positions and reports the final position of the robot.
###Specification
- The world is a rectangular and bounded grid.
- A robot position should consists of a grid coordinate (a pair of integers: x-coordinate followed by y-coordinate) and an orientation (N, S, E, W for north, south, east, and west).
- A robot instruction is a string of the letters “L”, “R”, and “F” which represent left, right and forward.
- A robot that moves off an edge of the grid is lost.
- Lost robots leave a robot “scent” that prohibits future robots from dropping off the world at the same grid point at the last grid position the robot occupied before disappearing over the edge.
- An instruction to move off the world from a grid point from which a robot has been previously lost is ignored by the current robot.
- The first line of input is the upper-right coordinates of the rectangular world, the lower-left coordinates are assumed to be 0, 0.
- The remaining input is a sequence of positions and instructions.
- Each robot is processed sequentially.
- For each robot position/instruction in the input, the output should indicate the final grid position and orientation of the robot.
- If a robot falls off the edge of the grid the word “LOST” should be printed after the position and orientation.
#####Sample Input
5 3
1 1 E
RFRFRFRF
3 2 N
FRRFLLFFRRFLL
0 3 W
LLFFFLFLFL#####Sample Output
1 1 E
3 3 N LOST
2 3 S###Technologies used
- Ruby
- RSpec
- Code Climate
###How to set it up
git clone https://github.com/aitkenster/mars-rover.git
cd mars-rover
bundle install###How to run it
cd mars-rover
ruby run.rb "mars_instructions.txt"The sample file "mars_instructions.txt" can be substituted for another instructions file.
###How to test it
cd mars-rover
rspec