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    Length: 1622 (0x656)
    Types: TextFile
    Names: »B«

└─⟦a7d1ea751⟧ Bits:30000550 8mm tape, Rational 1000, !users!projects 94_04_11
    └─⟦129cab021⟧ »DATA« 
        └─⟦this⟧ 
└─⟦2f6cfab89⟧ Bits:30000547 8mm tape, Rational 1000, !projects 94-01-04
    └─⟦d65440be7⟧ »DATA« 
        └─⟦this⟧ 

TextFile

with Text_Io;
package body Stack is
    Freecell : Pcell;

    procedure Create (F : in out Object) is
    begin
        F := Empty_Stack;
        Text_Io.Put_Line ("pile creee");
    end Create;



    function Newcell (E : in Integer) return Pcell is
        Result : Pcell;
    begin
        if Freecell /= null then
            Result := Freecell;
            Freecell := Freecell.Suc;
            Result.all := Cell'(E, null);
            return Result;
        else
            return new Cell'(E, null);
        end if;
    end Newcell;

    procedure Oldcell (O : Pcell) is
    begin
        O.Suc := Freecell;
        Freecell := O;

    end Oldcell;

    procedure Enqueue (F : in out Object; E : in Integer) is  
        Cellwork, Temp : Pcell;
    begin  
        Text_Io.Put_Line ("element empile : " & Integer'Image (E));
        if F = Empty_Stack then
            Cellwork := Newcell (E);
            F.Head := Cellwork;
        else
            Cellwork := Newcell (E);
            Temp := F.Head;
            F.Head := Cellwork;
            F.Head.Suc := Temp;
        end if;



    end Enqueue;

    procedure Dequeue (F : in out Object; E : in out Integer) is
        Cellwork : Pcell;
    begin
        if F = Empty_Stack then
            raise Empty;
        else
            E := F.Head.Val;
            Cellwork := F.Head;
            F.Head := F.Head.Suc;
            Oldcell (Cellwork);
            Text_Io.Put_Line ("valeur depilee : " & Integer'Image (E));
        end if;
    end Dequeue;

begin
    for I in 1 .. 50 loop
        Freecell := new Cell'(0, Freecell);
    end loop;

end Stack;