編者:李國帥
能力不夠字數來湊,簡單說明三個常用標頭檔案。來自舊日誌。
三個檔案位於
c:\program files (x86)\microsoft visual studio 10.0\vc\include
主要定義系統對標準輸入,標準輸出,標準錯誤流的操作.
this file defines the structures, values, macros, and functions used by the level 2 i/o ("standard i/o") routines. [ansi/system v]
typedef unsigned __int64 size_t;
typedef unsigned short wchar_t;
struct _iobuf ;
typedef struct _iobuf file;
file *fp;
_crtimp extern file _iob
#define stdin (&_iob[0])
#define stdout (&_iob[1])
#define stderr (&_iob[2])
--- this file contains the function declarations for the low-level.file handling and i/o functions.
typedef __int64 intptr_t;
typedef __int64 time_t; /* time value */
struct _finddata_t ;
_crtimp int __cdecl _access(const char *, int);
_crtimp int __cdecl _chmod(const char *, int);
_crtimp int __cdecl _chsize(int, long);
_crtimp int __cdecl _close(int);
_crtimp int __cdecl _commit(int);
_crtimp int __cdecl _creat(const char *, int);
_crtimp int __cdecl _dup(int);
_crtimp int __cdecl _dup2(int, int);
_crtimp int __cdecl _eof(int);
_crtimp long __cdecl _filelength(int);
_crtimp intptr_t __cdecl _findfirst(const char *, struct _finddata_t *);
_crtimp int __cdecl _findnext(intptr_t, struct _finddata_t *);
_crtimp int __cdecl _findclose(intptr_t);
_crtimp int __cdecl _isatty(int);
_crtimp int __cdecl _locking(int, int, long);
_crtimp long __cdecl _lseek(int, long, int);
_crtimp char * __cdecl _mktemp(char *);
_crtimp int __cdecl _open(const char *, int, ...);
_crtimp int __cdecl _pipe(int *, unsigned int, int);
_crtimp int __cdecl _read(int, void *, unsigned int);
_crtimp int __cdecl remove(const char *);
_crtimp int __cdecl rename(const char *, const char *);
_crtimp int __cdecl _setmode(int, int);
_crtimp int __cdecl _sopen(const char *, int, int, ...);
_crtimp long __cdecl _tell(int);
_crtimp int __cdecl _umask(int);
_crtimp int __cdecl _unlink(const char *);
_crtimp int __cdecl _write(int, const void *, unsigned int);
包括型別轉換,應用程式操作控制,記憶體分配,引數型別說明
#define exit_success 0
#define exit_failure 1
#define _max_path 260 /* max. length of full pathname */
#define _max_drive 3 /* max. length of drive component */
#define _max_dir 256 /* max. length of path component */
#define _max_fname 256 /* max. length of file name component */
#define _max_ext 256 /* max. length of extension component */
errno_t __cdecl _set_errno(_in_ int _value);
errno_t __cdecl _get_errno(_out_ int * _value);
_crtimp __declspec(noreturn) void __cdecl exit(_in_ int _code);
_check_return_ _crtimp double __cdecl atof(_in_z_ const char *_string);
_check_return_ _crtimp __int64 __cdecl _atoi64(_in_z_ const char * _string);
_check_return_ _crtimp double __cdecl _wtof(_in_z_ const wchar_t *_str);
inline long abs(long _x)
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