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module pass_array_by_data_04_find_fit_module
contains
subroutine find_fit(data_x)
real, intent(in) :: data_x(:)
real :: y
y = 0
call fcn(data_x, y)
print *, y
if (abs(y - 6.0) > 1e-6) error stop
contains
subroutine fcn(data_x, y)
real, intent(in) :: data_x(:)
real, intent(out) :: y
integer :: i
do i = 1, size(data_x)
y = y + data_x(i)
end do
end subroutine fcn
end subroutine find_fit
end module
program main
use pass_array_by_data_04_find_fit_module, only: find_fit
implicit none
real :: data_x(3)
integer :: i
do i = 1, 3
data_x(i) = i
end do
call find_fit(data_x)
end program main
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