Fortran 中的相同示例

program typical_loop
    use omp_lib
    implicit none
    integer, parameter::N = 1000000, kd = kind( 1.d0 )
    real( kind = kd ) :: sum, tbegin, wtime
    integer::i

    sum = 0

    tbegin = omp_get_wtime()
    !$omp parallel do reduction( +: sum )
    do i = 1, N
        sum = sum + cos( 1.d0 * i )
    end do
    !$omp end parallel do
    wtime = omp_get_wtime() - tbegin

    print "( 'Computing ', i7, ' cosines and summing them with ', i2, &
        & ' threads took ', f6.4,'s' )", N, omp_get_max_threads(), wtime

    if ( sum > N ) then
        print *, "we only pretend using sum"
    end if
end program typical_loop

在這裡，我們再次計算和累積 100 萬個餘弦。我們計算迴圈並避免不必要的編譯器優化 - 我們假裝使用結果。