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module functions_15_module_1
implicit none
contains
subroutine sub_1(a, b, c, d, e, f)
integer, intent(inout) :: a
real, intent(inout) :: b
logical, intent(in) :: c
real, intent(in), optional :: d
integer, intent(in), optional :: e
real, intent(in) :: f
if (present(d)) then
a = b ** 2 + d
if (present(e)) then
b = b * f + e
else
b = b * f
end if
else
a = b ** 2
if (present(e)) then
b = b * f + e
else
b = b * f
end if
end if
end subroutine sub_1
end module
program functions_15
use functions_15_module_1, only: sub_1
implicit none
integer :: a
real :: b
a = 1
b = 2
call sub_1(a, b, .true., d=12.0, e=5, f=6.0)
call sub_1(a, b, .false., f=6.0)
call sub_1(a, b, .true., e=78, f=117.0)
call sub_1(a, b, .false., d=58.0, f=123.0)
print *, a, b
if (a /= 144288208) error stop
if (b /= 1477476.00) error stop
print *, f(), f(42) ! "f t"
contains
logical function f(x)
integer, intent(in), optional :: x
f = present(x)
end function
end program functions_15
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