57 lines
928 B
ObjectPascal
57 lines
928 B
ObjectPascal
// Äåìîíñòðàöèÿ ñîçäàíèÿ ïðîñòîãî êëàññà ñòåêà íà áàçå ìàññèâà
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type
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Stack<T> = class
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private
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a: array of T;
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last: integer;
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public
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constructor Create(sz: integer);
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begin
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SetLength(a,sz);
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last := 0;
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end;
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constructor Create;
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begin
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Create(100);
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end;
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procedure push(i: T);
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begin
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a[last] := i;
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Inc(last);
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end;
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function pop: T;
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begin
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Dec(last);
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pop := a[last];
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end;
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function top: T;
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begin
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top := a[last-1];
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end;
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function empty: boolean;
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begin
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Result := (last=0);
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end;
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function ToString: string; override;
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begin
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Result := '';
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for var i:=0 to last-1 do
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Result += a[i]+' ';
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end;
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end;
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var s: Stack<integer>;
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begin
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s := new Stack<integer>;
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s.push(7);
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s.push(2);
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s.push(5);
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s.push(4);
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writeln(s);
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while not s.empty do
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write(s.pop,' ');
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end.
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