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¾²Ì¬·½·¨¾ÍÊÇʹÓÃClass Function. ¾²Ì¬±äÁ¿ÔòʹÓõ¥Ôª¾Ö²¿±äÁ¿À´ÊµÏÖ. ´úÂëÈçÏÂ:
//=========================================
// StaticVarTestU - ¶¨ÒåÁË¿ÉÒÔ¼ÆÊýµÄÀ࣬ͨ¹ýÀà·½·¨¼´¿É·ÃÎÊ´ËÀàµÄ¶ÔÏóÊý
//=========================================
unit StaticVarTestU;
interface
type
TStaticVarClass = class
public
//constructor
constructor Create();
destructor Destroy; override;
//Àà·½·¨£¬È¡µÃ¶ÔÏóµÄ¼ÆÊý
class function ObjectCount: integer;
protected
private

end;
implementation
Var
LObjCount: integer;
{ TStaticVarClass }
constructor TStaticVarClass.Create;
begin
inc(LObjCount); //ʹÓþֲ¿±äÁ¿
end;
destructor TStaticVarClass.Destroy;
begin
dec(LObjCount); //ʹÓþֲ¿±äÁ¿

inherited;
end;
class function TStaticVarClass.ObjectCount: integer;
begin
Result := LObjCount; //·µ»Ø¾Ö²¿±äÁ¿
end;
initialization
LObjCount := 0; //³õʼ»¯
finalization
LObjCount := 0;
end.
//=========================================
// StaticTest - ²âÊÔ´úÂë,´´½¨10¸ö¶ÔÏó,²¢·ÃÎÊÆä¼ÆÊý,ÔÙFreeµô.
//=========================================
program StaticTest;
{$APPTYPE CONSOLE}
uses
SysUtils,
Classes,
StaticVarTestU in StaticVarTestU.pas;
procedure printObjCount;
begin
WriteLn(Format(The Object Count now is %d, [TStaticVarClass.ObjectCount]));
end;
var
i: integer;
mObjList: TList;
begin
{ TODO -oUser -cConsole Main : Insert code here }
mObjList := TList.Create;
printObjCount;
for i := 0 to 10 do
begin
mObjList.Add(TStaticVarClass.Create());
printObjCount;
end;
for i := 0 to mObjList.Count -1 do
begin
TStaticVarClass(mObjList.Items[i]).Free;
printObjCount;
end;
mObjList.Free;
readln;
end.