class Object
  int fibonaccit(int n)
      int a = 0
      int b = 1
      while_plus( n )
        int tmp = a
        a = b
        b = tmp + b
        n = n - 1
      end
      b.putint()
      return b
  end

  int main()
    return fibonaccit( 10 )
  end
end