C, c + + variable naming conventions

Reprinted from: http://blog.sina.com.cn/s/blog_8a7012cf01017h9p.html

Variable naming rules are designed to enhance the readability and ease of maintenance of your code. The following are the variable naming conventions that C + + must follow: 1, variable names can only be composed of letters (A-Z,A-Z) and Numbers (0-9) or underscores (_). 2. The first letter must be a letter or an underscore. 3. You cannot use C + + keywords to name variables to avoid conflicts. 4. Variable names are case-sensitive. Variable naming rules: First, use the shortest character to express the most accurate meaning. Second, use the variable prefix.           1, integer prefix int nId;            int prefix: Nshort sId;             Short prefix: sunsigned int unId//unsigned int prefix: Unlong lId;      Long prefix: l 2, floating-point prefix float fvalue;     Float prefix: fdouble dvalue;    Double prefix: D 3, character prefix char Chchar;     Char prefix: ch 4, string prefix char szpath;   Char string prefix: szstring strpath;   String string prefix: strcstring strpath;      MFC CString class Prefix: str 5, Boolean prefix bool Bisok;      BOOL type prefix: Bbool bisok;      MFC BOOL Prefix: B 6, pointer-type prefix char * PPATH;                   Pointer prefix: P 7, array prefix int arrnnum;    Array prefix: arrcstring arrstrname; Array prefix + type prefix + name 8, struct-body prefix student Txiaozhang;     struct Prefix: T 9, enum prefix enum Emweek;                   Enumeration prefix: Em 10, byte prefix byte Byip;        BYTE prefix: By 11, Word prefix DWORD Dwmsgid;           Double word prefix: Dwword wmsgid;       Word prefix: w 12, character pointer prefix LPCTSTR ptszname;                  TCHAR type is ptszlpcstr pszname;                  Pcszlpstr Pszname;          Psz 13, STL container prefix vector vecvalue;              Vector container prefix: VEC 14, RECT rectangle structure prefix rect rcchild;         Rccrect rcchild///RC 15, handle prefix hwnd Hwnddlg;                    Hhbrush HBr;                 Hhpen Hpen;       Hhbitmap Hbmpback;               h 16, Windows color prefix colorref crfont;           Cr 17, Windows DC prefix CDC dcclient; The member variables of the DC class start with M_,The variable is followed by a prefix.    CString M_strname; M_ start + type prefix + name four, define a variable, in order to simplify, without affecting the meaning of the variable, you can only use the prefix. RECT RC; All global variables start with g_, followed by variables, and variables are prefixed.                  int g_id; G VI, define the structure, to ensure that C and C + + compatible, using typedef statements, and struct type all uppercase, beginning with t_, pointer form with Pt_ start.         typedef struct TAG tstudent{int nId; CString StrName;} Student,*pstudent;     STUDENT Txiaozhang; Full definition structure Seven, a variable consists of multiple words, then the first letter of each word is capitalized. int Nstudentid; CString Strstudentname; Define a class with a C or T as the class name prefix. Class Cmylistctrl;class Tmylistctrl; The MFC control binding value category or control class category needs to start with m_ and prefix.              CEdit M_edt_strvalue;                     Edit Bound control category CListBox M_lb_nname;                     Listboxclistctrl M_lc_name; Listctrl;    CComboBox M_cb_name;                /combobox 10, the control ID is as simple as possible and indicates the type and meaning of the control. Button Idc_bnt_name; Edit Idc_edt_name; ListBox Idc_lb_name; Listctrl Idc_lc_name; ComboBox Idc_cb_name;

Xi. naming rules for variables in the project

The global variables for the project start with G_, class member variables with M_, local variables if the function is larger, you can consider using L_ to show that it is a local variable.

Prefix type example

G_ global variable G_servers

Class C or structural body cdocument,cprintinfo

M_ member Variable M_pdoc,m_ncustomers

12. Common object naming rules for Windows programming

Windows Object Example variables MFC class Example Object

HWND hwnd; cwnd* pWnd;

Hdlg Hdlg; cdialog* Pdlg;

HDC hdc; cdc* PDC;

Hgdiobj Hgdiobj; cgdiobject* Pgdiobj;

Hpen Hpen; cpen* Ppen;

Hbrush Hbrush; cbrush* Pbrush;

Hfont Hfont; cfont* Pfont;

Hbitmap Hbitmap; cbitmap* Pbitmap;

Hpalette Hpalette; Cpalette* Ppalette;

HRGN HRGN; crgn* prgn;

HMENU HMENU; cmenu* Pmenu;

HWND Hctl; cstatic* pstatic;

HWND Hctl; cbutton* pbtn;

HWND Hctl; cedit* PEdit;

HWND Hctl; clistbox* Plistbox;

HWND Hctl; ccombobox* Pcombobox;

C, c + + variable naming conventions