c语言变量命名规则较多较乱Clanguagevariablenamingmorechaos.docx

c语言变量命名规则较多较乱Clanguagevariablenamingmorechaos.docx

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c语言变量命名规则较多较乱Clanguagevariablenamingmorechaos

c语言变量命名规则_较多较乱（Clanguagevariablenaming_morechaos）

c语言变量命名规则_较多较乱（Clanguagevariablenaming_more

chaos）

Afewyearsago,CharlesSimonyi（wholaterbecameafamousprogrammerofMicrosoft）isdesignedbyusingaprefixbasednamingmethod,thismethodwascalledthe"Hungariannotation"tocommemoratehim.Histhoughtisaccordingtoeachidentifiermeanstogiveitaprefix.Microsoftlateradoptedthisideaforeachidentifieraprefixtoillustrateitsdatatype.Therefore,theprefixnisinteger,longintegervariableisNL,charactertypearrayvariableisCa,andthestring（endwithemptycharacterarraytype）withSZastheprefix.Thesenamesmaybeverystrange.Forexample:

lpszFoo"Foo"isapointertoanullterminatedstringforthelongpointer.

Theadvantageofthismethodistoenablepeopletopassthenameofthevariabletoidentifythetypeofavariable,ratherthantofindthedefinitionofit.Unfortunately,thismethodnotonlymakesthevariablenameverychatty,buttochangethevariabletypeworkhasbecomeverydifficult.InWindows3.1,thewholetypevariableto16wideif.Weuseanintegervariableatthebeginning,butafterthecalculationby30---40function,usingtheintegervariablewidthisnotenough,thenweshouldnotonlychangethetypeofthevariable,butalsotochangethenameofthisvariableinthe30--40function.

Becauseofunrealistic,exceptforsomestubbornYuanwaiWindowsprogramhasnoonetousethe"Hungariannotation".Thereisnodoubtthatinsomeoccasions,itstillexists,butmostpeoplehavenowabandonedit.Ingeneral,theinputprefixisabadidea,becauseitputthevariableinitstypetightly

tiedtogether.

Hungarianmethodsgenerallyhaveadvantagesoverfunctionsthatarelessthan30lines.

Especiallyforinterfaceprogramming,ithasadvantages.

ButtheHungarianapproachisadisasterforalgorithmsthathavestrongcomputationalrequirements,especiallywithmanyabstracttypesofC++.

Lookwhereyou'reusingit.

NowtherearegoodIDEtools,suchasVC,SourceInsight,andsoon

Theselectedvariablewillautomaticallypromptyouforitsdeclarationanddefinition,sothat

Hungariannomenclatureisnotverynecessary

It'sjustforthereadabilityoftheprogram

Infact,goodcodewritinghabitsaremoreimportantthanforcingHungariannomenclature

Systematicness。

Entirety。

Readability.Classificationshould

beclear.Theremustbenotes!

HungariannomenclatureisaMicrosoftnamingspecificationforvarioustypesofsymbolssuchasvariables,functions,objects,

prefixes,macros,andsoon.ThemainideaofHungariannomenclatureistoaddprefixestovariablesandfunctionnamestoimprovepeople'sunderstandingofprograms.ItwaslaunchedbyaHungarianwithinMicrosoft,andasaresultitbecamepopularwithinMicrosoftandpromotedtoWindowsdevelopersaroundtheworld.TheHungariannomenclatureisfollowed,followedbythefollowingexampleandthestyleofthecodeabove.It'snotthatallreadersaregoingtofollowit,butreadersareexpectedtofollowitasamodernsoftwaredeveloper.

AArrayarray

B,BOOL（int）,Boolean（integer）

By,Unsigned,Char（Byte）unsignedcharacters（bytes）

CCharcharacters（bytes）

CB,Count,of,bytesbytes

Cr,Color,reference,valuecolor（Reference）values

CXCountofX（Short）xcollection（shortinteger）

DWDWORD（unsigned,long）doubleword（unsignedlonginteger）

FFlags（usually,multiple,bit,values）flags（usuallywithmultiplevalues）

FNFunctionfunction

G_globalglobal

HHandlehandle

IIntegerinteger

LLonglonginteger

LPLongpointerlongpointer

M_Data,member,of,a,class,datamembersofaclass

NShortintshortinteger

指针ppoint

sstring字符串

以0结尾的字符串'szeroterminatedstring

文本规则tmtextmetric

the无符号整数unsignedint

unsignedlong（ulong）无符号长整数ul

wword（unsignedshort）无符号短整数

x,y,x,ycoordinates（short）坐标值/短整数

for空v

有关项目的全局变量用g_开始,类成员变量用m_,局部变量若函数较大则可考虑用l_用以显示说明其是局部变量.

前缀类型例子

（g_全局变量g_servers

（c类或者结构体cdocument,cprintinfo

mmm_成员变量_ncustomers_73.

vc常用前缀列表.

前缀类型描述例子

c.8位字符chgradetank

tchar16位unicode类型字符chnamech

（bbool布尔变量benabled

整型（其大小由操作系统决定）nlengthnint

nouint无符号整型nlength（其大小由操作系统决定）

wword16位无符号整型wpos

thelong32位有符号整型loffset

32位无符号整型dwrangedwdword

p*eup内存模块指针memorymodel,指针变量73

in长指针lpdoc*lp

lpszlpstr32位字符串指针lpszname

lpszlpcstr32位常量字符串指针lpszname

lpszlpctstr32位unicode类型常量指针lpszname

inwindows对象句柄hwndh

lpfn（fn）（）回调函数指针callbackfarpointertocallback

functionlpfnabort

windows对象名称缩写.

windows对象例子变量mfc类例子对象

hwndhwnd;cwnd*pwnd.

hdlghdlg;cdialog*pdlg.

hdchdc;cdc*pdc.

hgdiobjhgdiobj;cgdiobject*pgdiobj.

hpenhpen;cpen*nwpp.

hbrushhbrush;cbrush*pbrush.

hfonthfont;cfont*pfont.

hbitmaphbitmap;cbitmap*pbitmap.

hpalettehpalette;cpalette*ppalette.

hrgnhrgn;crgn*prgn.

hmenuhmenu;cmenu*pmenu.

hwndhctl;cstatic*pstatic.

hwndhctl;cbutton*pbtn.

hwndhctl.this*pedit.

hwndhctl;clistbox*plistbox.

hwndhctl;ccombobox*pcombobox.

vc常用宏定义命名列表.

前缀符号类型符号例子范围

a_标识多个资源共享的类型a_mainframe1~0x6fff

对话框资源._（dialog）._spell_~0x6fff.

hidd_基于对话框的上下文帮助hidd_0x20001~0x26ff_spell

check

idbidb_位图资源（bitmap）_~0x6fff_companylogo

IDC_cursorresource（Cursor）IDC_PENCIL1~0x6FFF

IDI_iconresource（Icon）IDI_NOTEPAD1~0x6FFF

ThecommanditemID_TOOLS_SPELLING0x8000~0xDFFFoftheID_orIDM_toolbarormenubar

TheHID_commandcontexthelpsHID_TOOLS_SPELLING0x18000~0x1DFFF

TheIDP_messageboxpromptsthetextresource

IDP_INVALID_PARTNO8~0xDFFF

TheHIDP_messageboxcontexthelpsHIDP_INVALID_PARTNO0x30008~0x3DFFF

IDS_stringresource（String）IDS_COPYRIGHT1~0x7FFF

ThecontrolresourceIDC_RECALC8~0xDFFFintheIDC_dialogbox

MicrosoftMFCmacronamingspecification

Nametype

_AFXDLLtheonlydynamiclinklibrary（Dynamic,Link,Library,DLL）version

_ALPHAcompilesonlytheDECAlphaprocessor

_DEBUGincludesdiagnosticdebugversion

_MBCScompilesamultibytecharacterset

_UNICODEopensUnicodeinanapplication

FunctionsprovidedbyAFXAPIMFC

CALLBACKfunctionsthatarecallbackbypointers

Libraryidentifiernaming

Identifiervaluesandmeanings

UANSI（N）orUnicode（U）

Ddebugorrelease:

D=debug;ignoreidentifierforrelease

Staticlibraryversionnamingspecification

Librarydescription

NAFXCWD.LIBdebugversion:

MFCstaticconnectionLibrary

NAFXCW.LIBrelease:

MFCstaticconnectionLibrary

UAFXCWD.LIBdebugversion:

MFCstaticconnectionlibrarywithUnicodesupport

UAFXCW.LIBrelease:

aMFCstaticconnectionlibrarywithUnicodesupport

Dynamicconnectionlibrarynamingspecification

Nametype

_AFXDLL'sonlydynamicconnectionLibrary（DLL）version

ThefunctionsprovidedbyWINAPIWindows

NewnamingconventionsinWindows.h

Typedefinitiondescription

WINAPIusestheFARPASCALlocationintheAPIdeclaration,andifyouarewritingaDLLthathastheexportpopulationpointofAPI,youcanusethistypeinyourownAPI

CALLBACKusesthelocationoftheFARPASCALintheapplicationcallbackprogram,suchaswindowsanddialogs

LPCSTRisthesameasLPSTR,exceptthatLPCSTRisusedasaread-onlystringpointer,anditsdefinitionissimilar（const,char,FAR*）

UINTportableunsignedintegertypewhosesizeisdeterminedbythehostenvironment（forWindows,NT,andWindows9xis32bit）;itissynonymouswithunsignedint

ThetypeofthereturnedvalueoftheLRESULTwindowprogram

LPARAMdeclaresthetypeusedbylParam,andlParamisthefourthparameterofthewindowprogram

WPARAMdeclaresthetypeusedbywParam,andwParamisthethirdparameterofthewindowprogram

LPVOIDgeneralpointertype,thesameas（void*）,canbeusedinsteadofLPSTR

InMSDN,acodereferencethatfollowsthecodestyleandHungariannomenclatureisprovidedasfollows:

1#include"sy.h""

2externint*rgwDic;

3externintbsyMac;

4,struct,SY,*PsySz（char,sz[]）

{6

7char*pch;

8intcch;

9,struct,SY,*psy,*PsyCreate（）;

10int*pbsy;

11intcwSz;

12unsignedwHash=0;

13pch=sz;

14while（*pch,=0）

15wHash=wHash<>11+*pch++;

16cch=pch-sz;

17pbsy=&rgbsyHash[（wHash&077777）%cwHash];

18for（（*pbsy）=0;pbsy=&psy->bsyNext）

19{

20char*szSy;

21szSy=（psy=（struct,SY*）&rgwDic[*pbsy]）->sz;

22pch=sz;

23while（*pch==*szSy++）

24{

25if（*pch++==0）

26return（psy）;

27}

28}

29cwSz=0;

30if（cch>=2）

31cwSz=cch-2/sizeof（int）+1;

32×pbsy=（int*）（PSY=psycreate（cwsy+cwsz））-rgwdic;

33零（（int*）PSY，cwsy）;

34bltbyte（SZ，PSY->SZ，CCH+1）;

35回（PSY）;

36}