rubyでbrainfuck実装してみたったー！

brainfuck.rb

# coding: utf-8

@eip = 0
@before_bracket = 0
@is_skip = false
@memory = Array.new(30000) { 0 }
@pointer = 0

code = "+++++++++[>++++++++>+++++++++++>+++++<<<-]>.>++.+++++++..+++.>-.
------------.<++++++++.--------.+++.------.--------.>+."

def get_elem
  @memory[@pointer]
end

def brainfuck command
  
  if @is_skip
    if command == "]"
      @is_skip = false
    end
    return
  end
  
  case command
  when "."
    print get_elem.chr
  when "+"
    @memory[@pointer] += 1
  when "-"
    @memory[@pointer] -= 1
  when ">"
    @pointer += 1
  when "<"
    @pointer -= 1
  when "["
    if get_elem == 0
      @is_skip = true
    else
      @before_bracket = @eip
    end
  when "]"
    if get_elem != 0
      @eip = @before_bracket
    end
  end
end

while @eip < code.length
  ch = code[@eip]
  brainfuck(ch)
  @eip += 1
end