本文为【DELPHI中的记录类型【存储方式和变体记录】】的汉字拼音对照版显示拼音
一yi、DELPHI中zhong记ji录lu的de存cun储chu方fang式shi
在zaiDELPHI中zhong,我wo们men用yongrecord关guan键jian字zi来lai表biao明ming一yi个ge记ji录lu,有you时shi候hou,我wo们men还huan会hui看kan到dao用yongpacked record来lai声sheng明ming的de记ji录lu,这zhe二er者zhe的de区qu别bie就jiu在zai于yu存cun储chu方fang式shi的de不bu同tong。
在zaiwindows中zhong,内nei存cun的de分fen配pei一yi次ci是shi4个ge字zi节jie的de,而erPacked按an字zi节jie进jin行xing内nei存cun的de申shen请qing和he分fen配pei,这zhe样yang速su度du要yao慢man一yi些xie,因yin为wei需xu要yao额e外wai的de时shi间jian来lai进jin行xing指zhi针zhen的de定ding位wei。因yin此ci如ru果guo不bu用yongPacked的de话hua,Delphi将jiang按an一yi次ci4个ge字zi节jie的de方fang式shi申shen请qing内nei存cun,因yin此ci如ru果guo一yi个ge变bian量liang没mei有you4个ge字zi节jie宽kuan的de话hua也ye要yao占zhan4个ge字zi节jie!这zhe样yang浪lang费fei了le一yi些xie空kong间jian,但dan提ti高gao了le效xiao率lv。所suo谓wei鱼yu与yu熊xiong掌zhang不bu可ke兼jian得de。
例li如ru一yi个ge记ji录lu,以yi,sizeof(wudi)应ying该gai得de到dao8。而er如ru果guo使shi用yongpacked关guan键jian字zi,那na么mesizeof(wudi)则ze得de到dao5。
type wudi= record
age : integer;
sex : shortint;
end;
其qi中zhongage是shiinteger类lei型xing,正zheng好hao4个ge字zi节jie,而ersex是shishowint类lei型xing,占zhan用yong一yi个ge字zi节jie,但dan基ji于yu4字zi节jie得de内nei存cun分fen配pei方fang式shi,这zhe里li它ta也ye将jiang占zhan用yong4个ge字zi节jie。所suo
二er、DELPHI中zhong的de变bian体ti记ji录lu
在zaiDELPHI中zhong,观guan察chaTmessage和heTTypeData的de定ding义yi的de定ding义yi,从cong关guan键jian字zirecord,你ni一yi眼yan就jiu可ke以yi看kan出chu,它ta是shi一yi个ge记ji录lu类lei型xing,但dan仔zai细xi观guan察cha,你ni又you会hui发fa现xian在zai它ta的de定ding义yi中zhong出chu现xian了lecase关guan键jian字zi。它ta代dai表biao什shen么me呢ne?
它ta代dai表biao此ci记ji录lu是shi变bian体ti记ji录lu。让rang我wo们men先xian去qu了le解jie一yi下xia变bian体ti记ji录lu。
2.1一yi个ge典dian型xing的de变bian体ti记ji录lu定ding义yi如ru下xia:
type recordTypeName = record
fieldList1: type1;
...
fieldListn: typen;
case tag: ordinalType of
constantList1: (variant1);
...
constantListn: (variantn);
end;
其qi中zhongcase到dao结jie尾yi部bu分fen定ding义yi了le多duo个ge变bian体ti字zi段duan。所suo有you变bian体ti字zi段duan共gong享xiang一yi段duan内nei存cun大da小xiao又you最zui大da变bian体ti字zi段duan决jue定ding。
2.2使shi用yong变bian体ti记ji录lu时shi要yao注zhu意yi:
(1)Long String、WideString、Dynamic Array、Interface的de大da小xiao都dou是shi指zhi针zhen大da小xiao, OleVariant其qi实shi就jiu是shiCOM SDK中zhong的deVARIANT结jie构gou,大da小xiao是shi16字zi节jie。但dan在zaiObject Pascal中zhong它ta们men都dou需xu要yao自zi动dong终zhong结jie化hua,如ru果guo它ta们men出chu现xian在zaivariant part中zhong,编bian译yi器qi就jiu无wu法fa知zhi道dao它ta们men是shi否fou应ying该gai进jin行xing终zhong结jie化hua――因yin为wei不bu知zhi道dao当dang前qian存cun储chu的de是shi哪na种zhong类lei型xing。
(2)所suo有you变bian体ti字zi段duan共gong享xiang一yi段duan内nei存cun。而er共gong享xiang内nei存cun的de大da小xiao则ze由you最zui大da变bian体ti字zi段duan决jue定ding。
(3)当dangtag存cun在zai时shi,它ta也ye是shi记ji录lu的de一yi个ge字zi段duan。也ye可ke以yi没mei有youtag。
(4)记ji录lu的de变bian体ti部bu分fen的de条tiao件jian域yu必bi须xu是shi有you序xu类lei型xing
(5)记ji录lu类lei型xing中zhong可ke以yi含han有you变bian体ti部bu分fen,有you点dian象xiangcase语yu句ju,但dan没mei有you最zui好hao的deend,变bian体ti部bu分fen必bi需xu在zai记ji录lu中zhong其qi他ta字zi段duan的de声sheng明ming之zhi后hou
2.3变bian体ti记ji录lu得de作zuo用yong
(1)节jie约yue空kong间jian。对dui于yu那na些xie要yao根gen据ju条tiao件jian而er决jue定ding是shi否fou存cun储chu得de类lei型xing,完wan全quan可ke以yi利li用yong变bian体ti记ji录lu来lai达da到dao节jie约yue空kong间jian得de效xiao果guo。例li如ru,一yi个ge公gong司si的de员yuan工gong薪xin水shui可ke以yi是shi月yue薪xin、年nian薪xin等deng方fang式shi,那na么me并bing没mei有you必bi要yao在zai记ji录lu中zhong都dou分fen配pei空kong间jian而er又you用yong不bu到dao。
(2)类lei型xing的de转zhuan换huan。例li如ru,如ru果guo有you一yi个ge64位wei的de整zheng数shu类lei型xing作zuo为wei变bian体ti的de第di一yi个ge字zi段duan,一yi个ge32位wei的de整zheng数shuInteger类lei型xing作zuo为wei另ling一yi个ge变bian体ti的de第di一yi个ge字zi段duan,那na么me可ke以yi向xiang64字zi段duan赋fu值zhi然ran后hou以yi整zheng数shuInteger字zi段duan读du出chu其qi前qian32位wei
(3)妙miao用yong还huan有you很hen多duo,根gen据ju它ta的de原yuan理li挖wa掘jue吧ba
2.4一yi个ge演yan示shi变bian体ti记ji录lu使shi用yong的de例li子zi
...{
作zuo者zhe :wudi_1982
联lian系xi方fang式shi:wudi_1982@hotmail.com
转zhuan载zai请qing著zhu名ming出chu处chu
}
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs,typinfo, StdCtrls, ComCtrls, ExtCtrls;
type
WdFileType = (Files, Dirs);//类lei型xing信xin息xi
TWdFileInfo = record//一yi个ge变bian体ti记ji录lu
Fname: string[10];//文wen件jian名ming
case typeid:WdFileType of//根gen据ju是shi文wen件jian夹jia还huan是shi文wen件jian来lai决jue定ding
Files : (Fsize : integer);//文wen件jian大da小xiao
Dirs : (Dsize : integer;//文wen件jian夹jia大da小xiao
ContainFileCount : integer;//包bao含han文wen件jian的de个ge数shu
ContainDirCount : integer);//包bao含han文wen件jian夹jia的de个ge数shu
end;
TForm1 = class(TForm)
Memo1: TMemo;
Panel1: TPanel;
Button1: TButton;
GroupBox1: TGroupBox;
Label1: TLabel;
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
pp : array[0..1] of TWdFileInfo;//一yi个ge变bian体ti记ji录lu数shu组zu
procedure ShowInfo; //在zaimemo中zhong显xian示shi当dang前qian变bian体ti记ji录lu的de信xin息xi
public
end;
var
Form1: TForm1;
implementation
...{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
begin
//初chu始shi化hua是shi为wei记ji录lu赋fu值zhi
with pp[0] do
begin
Fname := 'PP0';
typeid := Files;
//fsize和hedsize实shi际ji用yong的de是shi同tong一yi块kuai存cun储chu空kong间jian,
//这zhe里li两liang个ge都dou赋fu值zhi了le,存cun储chu空kong间jian中zhong记ji录lu的de自zi然ran是shi后hou者zhe
Fsize := 10;
Dsize := 100;
ContainFileCount := 1;
ContainDirCount := 2;
end;
with pp[1] do
begin
Fname := 'PP1';
typeid := Dirs;
Fsize := 0;
Dsize := 100;
ContainFileCount := 11;
ContainDirCount := 222;
end;
Memo1.Clear;
ShowInfo;
end;
procedure TForm1.ShowInfo;
var
i : integer;
fs : string;
begin
Memo1.Lines.Add('变bian体ti记ji录lu信xin息xi显xian示shi');
for i := 0 to 1 do
begin
fs := Format('PP%d的de大da小xiao是shi(%d)'+#13+'Fsize:(%d),Dsize:(%d)'+#13+'ContainFileCount:(%d),CDirCount:(%d);'
,[i,sizeof(pp[i]),pp[i].Fsize,pp[i].Dsize,pp[i].ContainFileCount,pp[i].ContainDirCount]);
Memo1.Lines.Add(fs);
Memo1.Lines.Add('------------------------');
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
Memo1.Clear;
end;
end.
转zhuan载zai请qing著zhu名ming出chu处chu,谢xie谢xie!
【
原文】
一、DELPHI中记录的存储方式
在DELPHI中,我们用record关键字来表明一个记录,有时候,我们还会看到用packed record来声明的记录,这二者的区别就在于存储方式的不同。
在windows中,内存的分配一次是4个字节的,而Packed按字节进行内存的申请和分配,这样速度要慢一些,因为需要额外的时间来进行指针的定位。因此如果不用Packed的话,Delphi将按一次4个字节的方式申请内存,因此如果一个变量没有4个字节宽的话也要占4个字节!这样浪费了一些空间,但提高了效率。所谓鱼与熊掌不可兼得。
例如一个记录,以,sizeof(wudi)应该得到8。而如果使用packed关键字,那么sizeof(wudi)则得到5。
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] type wudi= record
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] age : integer;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] sex : shortint;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] end;
其中age是integer类型,正好4个字节,而sex是showint类型,占用一个字节,但基于4字节得内存分配方式,这里它也将占用4个字节。所
二、DELPHI中的变体记录
在DELPHI中,观察Tmessage和TTypeData的定义的定义,从关键字record,你一眼就可以看出,它是一个记录类型,但仔细观察,你又会发现在它的定义中出现了case关键字。它代表什么呢?
它代表此记录是变体记录。让我们先去了解一下变体记录。
2.1一个典型的变体记录定义如下:
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]type recordTypeName = record
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] fieldList1: type1;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] ...
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] fieldListn: typen;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]case tag: ordinalType of
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] constantList1: (variant1);
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] ...
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] constantListn: (variantn);
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]end;
其中case到结尾部分定义了多个变体字段。所有变体字段共享一段内存大小又最大变体字段决定。
2.2使用变体记录时要注意:
(1)Long String、WideString、Dynamic Array、Interface的大小都是指针大小, OleVariant其实就是COM SDK中的VARIANT结构,大小是16字节。但在Object Pascal中它们都需要自动终结化,如果它们出现在variant part中,编译器就无法知道它们是否应该进行终结化――因为不知道当前存储的是哪种类型。
(2)所有变体字段共享一段内存。而共享内存的大小则由最大变体字段决定。
(3)当tag存在时,它也是记录的一个字段。也可以没有tag。
(4)记录的变体部分的条件域必须是有序类型
(5)记录类型中可以含有变体部分,有点象case语句,但没有最好的end,变体部分必需在记录中其他字段的声明之后
2.3变体记录得作用
(1)节约空间。对于那些要根据条件而决定是否存储得类型,完全可以利用变体记录来达到节约空间得效果。例如,一个公司的员工薪水可以是月薪、年薪等方式,那么并没有必要在记录中都分配空间而又用不到。
(2)类型的转换。例如,如果有一个64位的整数类型作为变体的第一个字段,一个32位的整数Integer类型作为另一个变体的第一个字段,那么可以向64字段赋值然后以整数Integer字段读出其前32位
(3)妙用还有很多,根据它的原理挖掘吧
2.4一个演示变体记录使用的例子
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gif[/img][/url][url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedBlock.gif[/img][/url]...{
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif[/img][/url] 作者 :wudi_1982
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif[/img][/url] 联系方式:wudi_1982@hotmail.com
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif[/img][/url] 转载请著名出处
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockEnd.gif[/img][/url]}
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]unit Unit1;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]interface
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]uses
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Dialogs,typinfo, StdCtrls, ComCtrls, ExtCtrls;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]type
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] WdFileType = (Files, Dirs);//类型信息
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] TWdFileInfo = record//一个变体记录
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Fname: string[10];//文件名
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] case typeid:WdFileType of//根据是文件夹还是文件来决定
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Files : (Fsize : integer);//文件大小
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Dirs : (Dsize : integer;//文件夹大小
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] ContainFileCount : integer;//包含文件的个数
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] ContainDirCount : integer);//包含文件夹的个数
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] end;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] TForm1 = class(TForm)
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Memo1: TMemo;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Panel1: TPanel;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Button1: TButton;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] GroupBox1: TGroupBox;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Label1: TLabel;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] procedure FormCreate(Sender: TObject);
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] procedure Button1Click(Sender: TObject);
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] private
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] pp : array[0..1] of TWdFileInfo;//一个变体记录数组
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] procedure ShowInfo; //在memo中显示当前变体记录的信息
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] public
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] end;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]var
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Form1: TForm1;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]implementation
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gif[/img][/url][url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedBlock.gif[/img][/url]...{$R *.dfm}
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]procedure TForm1.FormCreate(Sender: TObject);
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]begin
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] //初始化是为记录赋值
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] with pp[0] do
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] begin
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Fname := 'PP0';
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] typeid := Files;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] //fsize和dsize实际用的是同一块存储空间,
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] //这里两个都赋值了,存储空间中记录的自然是后者
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Fsize := 10;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Dsize := 100;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] ContainFileCount := 1;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] ContainDirCount := 2;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] end;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] with pp[1] do
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] begin
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Fname := 'PP1';
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] typeid := Dirs;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Fsize := 0;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Dsize := 100;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] ContainFileCount := 11;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] ContainDirCount := 222;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] end;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Memo1.Clear;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] ShowInfo;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]end;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]procedure TForm1.ShowInfo;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]var
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] i : integer;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] fs : string;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]begin
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Memo1.Lines.Add('变体记录信息显示');
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] for i := 0 to 1 do
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] begin
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] fs := Format('PP%d的大小是(%d)'+#13+'Fsize:(%d),Dsize:(%d)'+#13+'ContainFileCount:(%d),CDirCount:(%d);'
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] ,[i,sizeof(pp[i]),pp[i].Fsize,pp[i].Dsize,pp[i].ContainFileCount,pp[i].ContainDirCount]);
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Memo1.Lines.Add(fs);
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Memo1.Lines.Add('------------------------');
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] end;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]end;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]procedure TForm1.Button1Click(Sender: TObject);
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]begin
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Memo1.Clear;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]end;
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]end.
[url=http://www.wangchao.net.cn/bbs/hydetail_501491.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]
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