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! equivalent to openmp_06.f90
subroutine increment_ctr(n, ctr)
! use omp_lib
implicit none
integer, intent(in) :: n
integer, intent(inout) :: ctr
integer :: local_ctr
integer :: i
local_ctr = 0
do concurrent (i = 1:n) reduce(+:local_ctr)
local_ctr = local_ctr + 1
end do
ctr = ctr + local_ctr
end subroutine
program do_concurrent_03
use omp_lib
integer, parameter :: n = 1000000
integer :: ctr
call omp_set_num_threads(8)
ctr = 0
call increment_ctr(n, ctr)
print *, ctr
if (ctr /= 1000000) error stop
end program
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