Task: Box the compass








VB: Public Sub box_the_compass()
    Dim compass_point As Integer
    Dim compass_points_all As New Collection
    Dim test_points_all As New Collection
    Dim compass_points(8) As Variant
    Dim test_points(3) As Variant
    compass_points(1) = [{ "North",        "North by east",        "North-northeast",      "Northeast by north"}]
    compass_points(2) = [{ "Northeast",    "Northeast by east",    "East-northeast",       "East by north"}]
    compass_points(3) = [{ "East",         "East by south",        "East-southeast",       "Southeast by east"}]
    compass_points(4) = [{ "Southeast",    "Southeast by south",   "South-southeast",      "South by east"}]
    compass_points(5) = [{ "South",        "South by west",        "South-southwest",      "Southwest by south"}]
    compass_points(6) = [{ "Southwest",    "Southwest by west",    "West-southwest",       "West by south"}]
    compass_points(7) = [{ "West",         "West by north",        "West-northwest",       "Northwest by west"}]
    compass_points(8) = [{ "Northwest",    "Northwest by north",   "North-northwest",      "North by west"}]
    test_points(1) = [{ 0.0,  16.87,  16.88,  33.75,  50.62,  50.63,  67.5,   84.37,  84.38, 101.25, 118.12}]
    test_points(2) = [{ 118.13, 135.0,  151.87, 151.88, 168.75, 185.62, 185.63, 202.5,  219.37, 219.38, 236.25}]
    test_points(3) = [{ 253.12, 253.13, 270.0,  286.87, 286.88, 303.75, 320.62, 320.63, 337.5,  354.37, 354.38}]
    For i = 1 To 3
        For Each t In test_points(i)
            test_points_all.Add t
        Next t
    Next i
    For i = 1 To 8
        For Each c In compass_points(i)
            compass_points_all.Add c
        Next c
    Next i
    For i = 1 To test_points_all.Count
        compass_point = (WorksheetFunction.Floor(test_points_all(i) * 32 / 360 + 0.5, 1) Mod 32) + 1
        Debug.Print Format(compass_point, "@@"); "  "; compass_points_all(compass_point);
        Debug.Print String$(20 - Len(compass_points_all(compass_point)), " ");
        Debug.Print test_points_all(i)
    Next i
End Sub



Fortran: Program Compass
  implicit none

  integer :: i, ind
  real :: heading

  do i = 0, 32
    heading = i * 11.25
    if (mod(i, 3) == 1) then
      heading = heading + 5.62
    else if (mod(i, 3) == 2) then
            heading = heading - 5.62
    end if
    ind = mod(i, 32) + 1
    write(*, "(i2, a20, f8.2)") ind, compasspoint(heading), heading
  end do

contains

function compasspoint(h)
  character(18) :: compasspoint
  character(18) :: points(32) = (/ "North             ", "North by east     ", "North-northeast   ", & 
             "Northeast by north", "Northeast         ", "Northeast by east ", "East-northeast    ", &
             "East by north     ", "East              ", "East by south     ", "East-southeast    ", &
             "Southeast by east ", "Southeast         ", "Southeast by south", "South-southeast   ", &
             "South by east     ", "South             ", "South by west     ", "South-southwest   ", &
             "Southwest by south", "Southwest         ", "Southwest by west ", "West-southwest    ", &
             "West by south     ", "West              ", "West by north     ", "West-northwest    ", &
             "Northwest by west ", "Northwest         ", "Northwest by north", "North-northwest   ", &
             "North by west     "  /)  
  real, intent(in) :: h
  real :: x

  x = h / 11.25 + 1.5
  if (x >= 33.0) x = x - 32.0
  compasspoint = points(int(x))
end function compasspoint
end program Compass