entry_2.f90

linux下编程用 编译软件

! Test alternate entry points for functions when the result types
! of all entry points match

	character*(*) function f1 (str, i, j)
	character str*(*), e1*(*), e2*(*)
	integer i, j
	f1 = str (i:j)
	return
	entry e1 (str, i, j)
	i = i + 1
	entry e2 (str, i, j)
	j = j - 1
	e2 = str (i:j)
	end function

	character*5 function f3 ()
	character e3*(*), e4*(*)
	integer i
	f3 = 'ABCDE'
	return
	entry e3 (i)
	entry e4 (i)
	if (i .gt. 0) then
	  e3 = 'abcde'
	else
	  e4 = 'UVWXY'
	endif
	end function

	program entrytest
	character f1*16, e1*16, e2*16, str*16, ret*16
	character f3*5, e3*5, e4*5
	integer i, j
	str = 'ABCDEFGHIJ'
	i = 2
	j = 6
	ret = f1 (str, i, j)
	if ((i .ne. 2) .or. (j .ne. 6)) call abort ()
	if (ret .ne. 'BCDEF') call abort ()
	ret = e1 (str, i, j)
	if ((i .ne. 3) .or. (j .ne. 5)) call abort ()
	if (ret .ne. 'CDE') call abort ()
	ret = e2 (str, i, j)
	if ((i .ne. 3) .or. (j .ne. 4)) call abort ()
	if (ret .ne. 'CD') call abort ()
	if (f3 () .ne. 'ABCDE') call abort ()
	if (e3 (1) .ne. 'abcde') call abort ()
	if (e4 (1) .ne. 'abcde') call abort ()
	if (e3 (0) .ne. 'UVWXY') call abort ()
	if (e4 (0) .ne. 'UVWXY') call abort ()
	end program