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module test_default_format

  interface test

    module procedure test_rl

  end interface test

  integer, parameter :: kl = selected_real_kind (precision (0.0_8) + 1)

  integer, parameter :: count = 200

contains

  function test_rl (start, towards) result (res)

    integer, parameter :: k = kl

    integer, intent(in) :: towards

    real(k), intent(in) :: start

    integer :: res, i

    real(k) :: x, y

    character(len=100) :: s

    res = 0

    if (towards >= 0) then

      x = start

      do i = 0, count

        write (s,*) x

        read (s,*) y

        if (y /= x) res = res + 1

        x = nearest(x,huge(x))

      end do

    end if

    if (towards <= 0) then

      x = start

      do i = 0, count

        write (s,*) x

        read (s,*) y

        if (y /= x) res = res + 1

        x = nearest(x,-huge(x))

      end do

    end if

  end function test_rl

end module test_default_format