basicmaze.rb

#!/usr/bin/env ruby
#This file should be more or less clean now.
class Command
attr_accessor :loc
    def initialize(loc = 0) #initialize the location variable, values are handled in commands.
        @loc = loc
    end
    def go_west             #define west command
        if @loc == 0
            @loc = 1
            puts "West room"
        elsif @loc == 3
            @loc = 0
            puts "Center room"
        else
            puts "You can't go that way."
        end
    end
    def go_east             #define east command
        if @loc == 0
            @loc = 3
            puts "East room"
        elsif @loc == 1
            @loc = 0
            puts "Center room"
        else
            puts "You can't go that way."
        end
    end
    def go_south            #define south command
        if @loc == 0
            @loc = 4
            puts "South room"
        elsif @loc == 2
            @loc = 0
            puts "Center room"
        else
            puts "You can't go that way."
        end
    end
    def go_north            #define north command
        if @loc == 0
            @loc = 2
            puts "North room- there is an exit here, in the north."
        elsif @loc == 4
            @loc = 0
            puts "Center room"
        elsif @loc == 2
            @loc = 5
            puts "End."
        else
            puts "You can't go that way."
        end
    end
end
if __FILE__ == $0   #make sure the file isn't being loaded as a library
cmd = Command.new   #create the new instance
    while cmd.loc != 5  #access the instance's location variable
        puts "Enter direction."
        command = gets.chomp    #get user's input, cutting off the automatic newline
        if command == "west"
            cmd.go_west
        elsif command == "east"
            cmd.go_east
        elsif command == "south"
            cmd.go_south
        elsif command == "north"
            cmd.go_north
        else
            puts "Unrecognized command."    #handle unexpected input
        end
    end
end