2023-06-03 20:50:04 +11:00
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module mathstuff2
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! XXX This module was a copy of mathstuff.f90 fromthe BloubWorld
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! XXX will be moved in an other place some day...
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implicit none
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contains
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! ----------------------------------------------------------------
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! really quick'n'dirty hack
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! not really tested yet...
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subroutine init_random_seed()
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integer, dimension(3) :: tarray
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integer :: t3, foo
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real :: dummy
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call itime(tarray)
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t3 = 3600*tarray(1) + 60*tarray(2) + tarray(3)
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! write(0, '(A,3I3,A,I6)') "sranding: ", tarray, " --> ", t3
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call srand(t3)
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! after initializing the random generator engine,
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! you MUST use it for initializing the initializer
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2023-06-06 21:22:56 +11:00
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do foo=1, tarray(1)+15
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2023-06-03 20:50:04 +11:00
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dummy = rand()
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enddo
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end subroutine
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2024-01-06 12:54:06 +11:00
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! ----------------------------------------------------------------
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logical function diff_sign(a, b)
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integer, intent(in) :: a, b
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! write(0, *) "diff_sign", a, b
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if ( (a .lt. 0) .and. (b .ge. 0) ) then
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diff_sign = .TRUE.
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return
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endif
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if ( (a .ge. 0) .and. (b .lt. 0) ) then
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diff_sign = .TRUE.
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return
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endif
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diff_sign = .FALSE.
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end function
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2023-06-03 20:50:04 +11:00
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! ----------------------------------------------------------------
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end module mathstuff2
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