DELETE
Àðãóìåíòû:
IN MSG ëþáàÿ íåïóñòàÿ ñòðîêà
NbC INT êîëè÷åñòâî ñèìâîëîâ, êîòîðûå íóæíî óäàëèòü
Pos INT ïîçèöèÿ ïåðâîãî ñèìâîëà äëÿ óäàëåíèÿ
(ïîçèöèÿ ïåðâîãî ñèìâîëà ñòðîêè - 1)
Q MSG èçìåíåííàÿ ñòðîêà
ïóñòàÿ ñòðîêà åñëè Pos < 1
ïåðâîíà÷àëüíàÿ ñòðîêà åñëè Pos > äëèíà IN
ïåðâîíà÷àëüíàÿ ñòðîêà åñëè NbC <= 0
Îïèñàíèå:
Óäàëÿåò ÷àñòü ñòðîêè.
(*FBD ïðèìåð áëîêà “DELETE”*)
(* ST Ýêâèâàëåíò: *)
complete_string := 'ABCD' + 'EFGH'; (* ïîëíàÿ ñòðîêà - ýòî 'ABCDEFGH' *)
sub_string := DELETE (complete_string, 4, 3); (* sub_string is 'ABGH' *)
(* IL Ýêâèâàëåíò: *)
LD 'ABCD'
ADD 'EFGH'
ST complete_string
DELETE 4,3
ST sub_string
