ename(var F; Newname);
Reset 开启一个已存在的档案。procedure Reset(var F [: File; Recsize: Word ] );
Rewrite 建立并开启一个新档。procedure Rewrite(var F: File [; Recsize: Word ] );
RmDir 删除一个空目录。procedure RmDir(S: String);
Seek 移动档案游标。procedure Seek(var F; N: Longint);
Truncate 删截目前位置以後的档案内容。procedure Truncate(var F);
========================================
记忆体管理函数 Memory-management Routines)
Unit: SysUtils
========================================
AllocMem 配置一个记忆体区块给堆积heap 。
function AllocMem(Size: Cardinal): Pointer;
ReAllocMem 从堆积释回一区块。function ReAllocMem(P: Pointer;CurSize, NewSize:Cardinal): Pointer;
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杂项函数 (Miscellaneous Routines)
Unit: System, SysUtils
========================================
AddExitProc 加入一个程序到执行时期程式库的出囗程序列中。
procedure AddExitProc(Proc: TProcedure);
Exclude 从一个集合除去一个元素。procedure Exclude(var S: set of T;I:T);
FillChar 以一个字元填入指定个数到一个变数上。
procedure FillChar(var X; Count: Word; value);
Hi 传回叁数的高位元组。function Hi(X): Byte;
Include 将元素包含到集合内。procedure Include(var S: set of T; I:T);
Lo 传回叁数的低位元组。function Lo(X): Byte;
Move 从Source 复制Count 个数的位元组到Dest 。
procedure Move(varSource,Dest; Count: Word);
ParamCount 传回命令列叁数的个数。function ParamCount: Word;
ParamStr 传回一个指定的命令列叁数。function ParamStr(Index): String;
Random 传回一个随机乱数。function Random[ ( Range: Word) ];
Randomize 初值化乱数产生器。procedure Randomize;
SizeOf 传回叁数所占位元组数。function SizeOf(X): Word;
Swap 将叁数的高位元组和低位元组交换。function Swap(X);
TypeOf 传回指向物件型态的虚拟方法表的指标。function TypeOf(X) : Pointer
UpCase 将字元转为大写。function UpCase(Ch: Char):Char;
========================================
次序函数 (Ordinal Routines)
Unit: System
========================================
Dec 递减一个变数。procedure Dec(var X[ ; N:Longint]);
Inc 递增一个变数procedure Inc(var X[ ; N:Longint ] );
Odd 判别式否为奇数。function Odd(X: Longint):Boolean;
Pred 传回叁数的前任者。function Pred(X);
Succ 传回叁数的後继者。function Succ(X);
========================================
指标和位址函数 (Pointer and Address Routines)
Unit: System
========================================
addr 传回指定物件的位址。function Addr(X): pointer;
Assigned 判断是否一个函数或程序是nil function Assigned(var P):Boolean;
CSeg 传回CS 程式段暂存器的内容。function CSeg: Word;
DSeg 传回DS 资料段暂存器的内容。function DSegt: Word;
Ofs 传回叁数的偏移位址。function Ofs(X): Word;
Ptr 将所指定的节段及偏移位址组合到一个指标。function Ptr(Seg, Ofs: Word):Pointer;
Seg 传回叁数的节段位址。function Seg(X): Word;
SPtr 传回SP 堆叠存器的内容。function SPtr: Word;
SSeg 传回SS 堆叠段暂存器的内容。function SSeg: Word;
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字串格式函数 (String-formatting Routines)
Unit: SysUtils
========================================
FmtStr 将所列叁数依照Format 的格式组合到Result 字串传回。
procedure FmtStr(var Resut: string; const Format:string;const Args: array of const);
Format 将所列叁数依照Format 的格式组合到Pascal 格式字串传回。
fonction Format(const Format: string;const Args:array of const): string;
FormatBuf 格式化所列的叁数。
FormatBuf(var Buffer;BufLen: Cardinal;const Format;FmtLen: Cardinal;const Args: array of string ): Cardinal;
function FormatBuf(var Buffer; BufLen: Word;const Format; FmtLen:Word;Const Args: array of const):Word;
StrFmt 格式化所列的叁数。
function StrFmt(Buffer, Format: PChar;const Args: array of const):PChar;
SysUtils
StrLFmt 格式化所列叁数，并将结果指向Buffer 指标。
function StrLFmt(Buffer: PChar; MxLen: Word;Format: PChar;const Args: array of const):PChar;
SysUtils
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字串处理函数(String-handling Routines :Pascal-style)
Unit: SystUtils
========================================
AnsiCompareStr 比较两个字串。function AnsiCompareStr(const S1, S2: string):Integer;
SysUtils
var
S: string;
mas: array[0..99] of string;
i, j: integer;
begin
...
for i:=1 to 98 do
for j:=i+1 to 99 do
if AnsiCompareStr( mas[i], mas[j] ) >0 then
begin
S:= mas[i]; mas[i]:= mas[j]; mas[j]:= S;
end;
end;
var
S1,S2: string;
I: Integer;
begin
S1:= ''''? ???? ???????? ??????'''';
S2:= ''''? ???? ???????? ??????'''';
I:= CompareStr(S1, S2); { I > 0, ?.?. S1 > S2 }
if I<>0 then
MessageDlg( ''''?????? ????????!'''', mtWarning, [mbOK],0);
end;
AnsiCompareText 比较两个字串且无大小写区别。
AnsiCompareText ( const S1, S2: string ): Integer;
SysUtils
AnsiCompareStr(''''a'''', ''''A'''') <0
CompareStr(''''a'''', ''''A'''') >0
function AnsiCompareText(const S1, S2: string):Integer;
AnsiLowerCase 将字串内容转为小写。function AnsiLowerCase(const S: string): string;
SysUtils
var
S: string;
begin
S:= ''''MyFile.TXT'''';
S:= AnsiLowerCase(S); // S := ''''myfile.txt''''
MessageDlg(S, mtInformation, [mbOk], 0);
end;
AnsiUpperCase 将字串内容转为大写。function AnsiUpperCase(const S: string): string;
SysUtils
var
S: string;
begin
S:= ''''c:\windows'''';
S:= AnsiUpperCase (S); { S := ''''C:\WINDOWS'''' }
MessageDlg(S, mtInformation, [mbOk], 0);
end;
AppendStr 将所给字串连接到Dest 字串後面。procedure AppendStr(var Dest: string; const S:string);
AssignStr 配置记忆体空间给字串。procedure AppendStr(var P: PString; const S:String);
CompareStr 比较两个字串。function CompareStr(const S1,S2: string):Integer;
CompareText 比较两个字串且无大小写区别。function CompareText(const S1, S2: String):Integer;
Concat 连结所列字串。function Concat(s1 [, s2,… , sn]: String):String;
Copy 传回字串的部份字串内容。function Copy(S: String; Index, Count:Integer): String;
Delete 删除所给字串内的子字串。procedure Delete(var S: String; Index,Count:Integer);
DisposeStr 释回字串占用的空间。procedure DisposeStr(P: PString);
FmtLoadStr 从程式的资源字串表中载入一个字串。
FmtLoadStr(Ident: Integer;const Args: array of string ): string;
SysUtils
function FmtLoadStr(Ident: Word;const Args: array of const): string;
Insert 在一个字串内插入一个子字串
procedure Insert(Source: String; var S: String;Index: Integer);
Insert (Source: string;var S: string;Index: Integer );
System
var
S: string;
begin
S:= ''''??????? ?????? ??????????.'''';
Insert( ''''!'''', S, 8); { S := ''''???????! ?????? ??????????.''''}
MessageDlg( S, mtWarning, [mbOK],0);
end;
IntToHex 将一个整数转为十六进位。
function IntToHex(Value: Longint; Digits:Integer): string;
IntToStr 将数字转成字中格式。function IntToStr(Value: Longint): string;
IsValidIdent 判别字串内容是否为正确的识别字。function IsValidIdent(const Ident: string):Boolean;
Length 传回字串的长度。function Length(S: String): Integer;
LoadStr 从应用程式的可执行档中载入一个字串资源。
function LoadStr(Ident: Word): string;
SysUtils
LowerCase 将字串转成小写。function LowerCase(const S: string): string;
NewStr 从堆积配置一个字串空间。function NewStr(const S: string): PString;
Pos 传回子字串在字串中的位置。function Pos(Substr: String; S: String):
Str 将数值转为字串。procedure Str(X [: Width [: Decimals ]];var S);
StrToInt 将字串转为整数值。function StrToInt(const S: string): Longint;
StrToIntDef 将字串转整数值或预设值。function StrToIntDef(const S: << 上一页 [31] [32] [33] [34] [35] 下一页 |
