Работа с динамическим списком, добавление/удаление по номеру Опции

[Анна]

Собственно задание в теме

program DinList;
uses crt;
type
    PItem = ^TItem;
    TItem = record
     Number:integer;
     Next:PItem;
    end;
var
   First:PItem;
   Num:char;

Function GetLast: PItem;
var
   Temp:PItem;
begin
   Temp:=First;
   while Assigned(Temp^.Next) do
     Temp:=Temp^.Next;
   GetLast:=Temp;
end;

Function AddItem: PItem;
var
   Temp:PItem;
begin
   AddItem:=nil;
   New(Temp);
   FillChar(Temp^, SizeOf(Temp^),0);
   if not Assigned(Temp) then Exit;
   if not Assigned(First) then First:=Temp
   else GetLast^.Next:=Temp;
   AddItem:=Temp;
end;

procedure FillItem(Item:PItem);
var
   s:string;
   v:integer;
   Code:integer;
begin
   if not Assigned(Item) then Exit;
   Writeln('vvedite chislo');
   Readln(s);
   Val(s,v,Code);
   if Code = 0 then Item^.Number:=v;
end;

procedure ClearList;
var
   Temp:PItem;
   Next:PItem;
begin
   Temp:=First;
   while Assigned(Temp) do
     begin
       Next:=Temp^.Next;
       Dispose(Temp);
       Temp:=Next;
       end;
   First:=nil;
end;

procedure FillList;
const
   InpL:set of char = ['Y','y','D','d',#13];
var
   c:char;
begin
   clrscr;
   ClearList;
   Writeln('Zapolnenie spiska');
   repeat
     FillItem(AddItem);
     Writeln('Prodolgit vvod? y/n');
   until not (ReadKey in InpL);
end;

procedure List;
var
   Temp:PItem;
   x,y:byte;
begin
   clrscr;
   Temp:=First;
   GotoXY(1,2);
   while Assigned(Temp) do
     begin
       Writeln(Temp^.Number);
       x:=whereX;
       y:=whereY;
       GotoXY(1,1);
       Writeln('Nagmite lubuy klavishu');
       GotoXY(x,y);
       Temp:=Temp^.Next;
       ReadKey;
     end;
   Writeln('konec spiska');
   ReadKey;
end;

procedure MainMenu;
begin
   clrscr;
   GotoXY(20,2);
   TextBackground(White);
   TextColor(Black);
   Writeln('Prog-a dlya raboty s dinam. spiskom');
   TextBackground(Black);
   TextColor(White);
   GotoXY(10,10);
   Writeln('0. Konec');
   GotoXY(10,11);
   Writeln('1. Sozdat spisok');
   GotoXY(10,12);
   Writeln('2. Ochistit spisok');
   GotoXY(10,13);
   Writeln('3. Dobavit element');
   GotoXY(10,14);
   Writeln('4. Prosmotret spisok');
   GotoXY(10,15);
   Writeln('5. Sortirovka');
   GotoXY(20,20);
   Write('Vvedite nomer punkta menu (0-5):');
end;

procedure Sortirovka;
var Temp:PItem;
begin
clrscr;
Temp:=First;
while Temp <>nil do
     begin
     Temp:=First;
     if odd(Temp^.Number) then dispose(Temp);
     First:=Temp^.next;
     end;
end;

begin
   First:=nil;
   repeat
     MainMenu;
     Num:=ReadKey;
     case Num of
     '1':FillList;
     '2':ClearList;
     '3':begin
           clrscr;
           FillItem(AddItem);
         end;
     '4':List;
     '5':Sortirovka;
     end;
   until Num = '0';
   ClearList;
end.

Не знаю как сделать добавление ПО НОМЕРУ, и удаление тоже ...

Сообщение отредактировано: volvo - 6.11.2006 17:44