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module my_subs
implicit none
interface my_sum
module procedure sum_real, sum_int
end interface my_sum
contains
subroutine sum_real (array, tot)
real, dimension(:), intent (in) :: array
real, intent (out) :: tot
integer :: i
tot = 1.0
do i=1, size (array)
tot = tot * array (i)
end do
end subroutine sum_real
subroutine sum_int (array, tot)
integer, dimension(:), intent (in) :: array
integer, intent (out) :: tot
integer :: i
tot = 0
do i=1, size (array)
tot = tot + array (i)
end do
end subroutine sum_int
end module my_subs
program test_dt
use my_subs
implicit none
type my_type
integer weight
real length
end type my_type
type (my_type), dimension (:), allocatable :: people
type (my_type) :: answer
allocate (people (2))
people (1) % weight = 1
people (1) % length = 1.0
people (2) % weight = 2
people (2) % length = 2.0
call my_sum ( people (:) % weight, answer % weight )
write (*, *) answer % weight
call my_sum ( people (:) % length, answer % length )
write (*, *) answer % length
end program test_dt
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