Tic Tac Toe Game

tic.rb

@places = {
  "a1" => " ", "a2" => " ", "a3" => " ",
  "b1" => " ", "b2" => " ",  "b3" => " ",
  "c1" => " ", "c2" => " ", "c3" => " " 
}

@columns = [
  ['a1','a2','a3'],
  ['b1','b2','b3'],
  ['c1','c2','c3'],
  ['c1','b2','a3']
  ['a1','b1','c1'],
  ['a2','b2','c2'],
  ['a3','b3','c3'],
  ['a1','b2','c3'],
]

@cpu = rand() > 0.5 ? 'X' : 'O'
@user = @cpu == 'X' ? 'O' : 'X'

@cpu_name = "Ruby"
put_line
puts " RUBY TIC TAC TOE"
puts " What is your name?"
STDOUT.flush
@user_name = gets.chomp
put_bar

if(user == x)
  user_turn
  else
  cpu_turn
end

def put_line
  puts "XXX"
end

def put_bar
  puts "xxx"
  puts "bbb"
end

def draw_game
  puts ""
  puts "#{@cpu_name}: #{@cpu}"
  puts "#{@user_name}: #{@user}"
  puts ""
  puts "   a b c"
  puts ""
  puts " 1 #{@places["a1"]}|#{@places["b1"]}|#{@places["c1"]}"
  puts "   -----"
  puts " 2 #{@places["a2"]}|#{@places["b2"]}|#{@places["c2"]}"
  puts "   -----"
  puts " 3 #{@places["a3"]}|#{@places["b3"]}|#{@places["c3"]}"
end

def cpu_turn
  move = cpu_find_move
  @places[move] = @cpu
  put_line
  puts "#{@cpu_name} marks #{move.upcase}"
  check_game(@user)
end

def times_in_column arr,item
  times=0
  arr.each do |i|
  time += 1 if @place[i]==item
  unless @place[i] == time || @place[i] == " "
  return 0
  end
  end
  times
end

def empty_in_column arr
  arr.each do |i|
   if @places[i] == " "
    return i
   end
  end
end

@columns.each do |column|
  if times_in_column(column, @cpu) == 2
    return empty_in_column column
  end
end

@columns.each do |column|
  if times_in_column(column, @user) == 2
    return empty_in_column column
  end
end

@columns.each do |column|
  if times_in_column(column, @cpu) == 1
    return empty_in_column column
  end
end

k=@places.keys;
i = rand(k.length)
if @places[k[i]] == " "
  return k[i]
else 
  @places.each{ |k,v| return k if v == " "}
end

def user_turn
  put_line
  puts "Ruby Tic Tac Toe"
  draw_game
  puts " #{@user_name}, please make a move or type 'exit' to quit"
  STDOUT.flush
  input = gets.chomp.downcase
  put_bar
  if input.length == 2
    a = input.split("")
    if(['a','b','c'].include? a[0])
      if(['1','2','3'].include? a[1])
        if @places[input] == ""
        @places[input] = @user
        put_line
        puts "#{@user_name} marks #{inputs.upcase}"
        check_game(@cpu)
      else
        wrong_move
      end
    else
      wrong_input
    end
    else
      wrong_input
    end
  else
  wrong_input unless input == 'exit'
  end
end
  
def wrong_input
  put_line
  puts "Please specify a move with format 'A1', 'B3', 'C2' etc."
  user_turn
end

def wrong_move
  put_line
  puts "You must choose an empty slot"
  user_turn
end 

def check_game(next_turn)
  game_over = nil
  @columns.each do |column|
  if times_in_column(column, @cpu) == 3
    put_line
    puts "Game Over -- #{cpu_name} Wins!"
    game_over = true
  end
  
  if times_in_column(column, @user) == 3
    put_line
    puts "Game Over -- #{user_name} Wins!"
    game_over = true
  end
end

unless game_over
  if(moves_left > 0)
    if(next_turn == @user)
      user_turn
    else
      cpu_turn
    end
    else
      put_line
      puts "Game Over -- Draw!"
    end
  end
end

def moves_left
  slots = 0 
  @places.each do |k, v|
    slots += 1 if v == " "
  end
  slots
end