function sint(s) result(i) implicit none character(len=*) :: s integer :: j, i i = 0 do j=len(s), 1, -1 if (.not.((i.eq.0).and.(s(j:j).eq.' '))) then i = i + ichar(s(j:j)) * 10 ** (j - 1) endif end do return end function sint function test_in_bytes4(a) result (i) implicit none integer :: sint character(len=4) :: a integer :: i i = sint(a) a(1:1) = 'A' return end function test_in_bytes4 function test_inout_bytes4(a) result (i) implicit none integer :: sint character(len=4), intent(inout) :: a integer :: i if (a(1:1).ne.' ') then a(1:1) = 'E' endif i = sint(a) return end function test_inout_bytes4