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Lesson topics

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Demo 2

program divisors
c This program finds the divisors of an integer input by the user.
c The divisors are printed to a file.
integer n, k, d(10)
open (unit = 1, file = "divisors")
print *, "Enter a positive integer :"
read *, n
write (1,*) "Here are the divisors of ", n, " :"
write (1,*)
k = 0
do i = 1, n
if (mod(n,i) .eq. 0) then
k = k + 1
d(k) = i
end if
if (k .eq. 10) then
write (1,5) (d(j), j = 1, 10)
k = 0
end if
end do
write (1,5) (d(j), j = 1, k)
5 format (10i7)
close(1)
print *
print *, "The divisors are listed in the file 'divisors'."
print *, "Good luck finding it! Bye!"
end