stdlib 头文件即standard library标准库函数头文件
stdlib 头文件里包含了C、C++语言的最常用的系统函数
该文件包含了C语言标准库函数的定义
文件内容代码很长，有兴趣的可以看一看。
#ifndef _INC_STDLIB #define _INC_STDLIB #include包含的函数#include #if defined (__USE_MINGW_ANSI_STDIO) && ((__USE_MINGW_ANSI_STDIO + 0) != 0) && !defined (__USE_MINGW_STRTOX) #define __USE_MINGW_STRTOX 1 #endif #pragma pack(push,_CRT_PACKING) #ifdef __cplusplus extern "C" { #endif #ifndef NULL #ifdef __cplusplus #ifndef _WIN64 #define NULL 0 #else #define NULL 0LL #endif #else #define NULL ((void *)0) #endif #endif #define EXIT_SUCCESS 0 #define EXIT_FAILURE 1 #ifndef _ONEXIT_T_DEFINED #define _ONEXIT_T_DEFINED typedef int (__cdecl *_onexit_t)(void); #ifndef NO_OLDNAMES #define onexit_t _onexit_t #endif #endif #ifndef _DIV_T_DEFINED #define _DIV_T_DEFINED typedef struct _div_t { int quot; int rem; } div_t; typedef struct _ldiv_t { long quot; long rem; } ldiv_t; #endif #ifndef _CRT_DOUBLE_DEC #define _CRT_DOUBLE_DEC #pragma pack(4) typedef struct { unsigned char ld[10]; } _LDOUBLE; #pragma pack() #define _PTR_LD(x) ((unsigned char *)(&(x)->ld)) typedef struct { double x; } _CRT_DOUBLE; typedef struct { float f; } _CRT_FLOAT; #pragma push_macro("long") #undef long typedef struct { long double x; } _LONGDOUBLE; #pragma pop_macro("long") #pragma pack(4) typedef struct { unsigned char ld12[12]; } _LDBL12; #pragma pack() #endif #define RAND_MAX 0x7fff #ifndef MB_CUR_MAX #define MB_CUR_MAX ___mb_cur_max_func() #ifndef __mb_cur_max #ifdef _MSVCRT_ extern int __mb_cur_max; #define __mb_cur_max __mb_cur_max #else extern int * __MINGW_IMP_SYMBOL(__mb_cur_max); #define __mb_cur_max (* __MINGW_IMP_SYMBOL(__mb_cur_max)) #endif #endif #define ___mb_cur_max_func() (__mb_cur_max) #endif #define __max(a,b) (((a) > (b)) ? (a) : (b)) #define __min(a,b) (((a) < (b)) ? (a) : (b)) #define _MAX_PATH 260 #define _MAX_DRIVE 3 #define _MAX_DIR 256 #define _MAX_FNAME 256 #define _MAX_EXT 256 #define _OUT_TO_DEFAULT 0 #define _OUT_TO_STDERR 1 #define _OUT_TO_MSGBOX 2 #define _REPORT_ERRMODE 3 #define _WRITE_ABORT_MSG 0x1 #define _CALL_REPORTFAULT 0x2 #define _MAX_ENV 32767 typedef void (__cdecl *_purecall_handler)(void); _CRTIMP _purecall_handler __cdecl _set_purecall_handler(_purecall_handler _Handler); _CRTIMP _purecall_handler __cdecl _get_purecall_handler(void); typedef void (__cdecl *_invalid_parameter_handler)(const wchar_t *,const wchar_t *,const wchar_t *,unsigned int,uintptr_t); _CRTIMP _invalid_parameter_handler __cdecl _set_invalid_parameter_handler(_invalid_parameter_handler _Handler); _CRTIMP _invalid_parameter_handler __cdecl _get_invalid_parameter_handler(void); #ifndef _CRT_ERRNO_DEFINED #define _CRT_ERRNO_DEFINED _CRTIMP extern int *__cdecl _errno(void); #define errno (*_errno()) errno_t __cdecl _set_errno(int _Value); errno_t __cdecl _get_errno(int *_Value); #endif _CRTIMP unsigned long *__cdecl __doserrno(void); #define _doserrno (*__doserrno()) errno_t __cdecl _set_doserrno(unsigned long _Value); errno_t __cdecl _get_doserrno(unsigned long *_Value); #ifdef _MSVCRT_ extern char *_sys_errlist[]; extern int _sys_nerr; #else extern _CRTIMP char *_sys_errlist[1]; extern _CRTIMP int _sys_nerr; #endif #if (defined(_X86_) && !defined(__x86_64)) _CRTIMP int *__cdecl __p___argc(void); _CRTIMP char ***__cdecl __p___argv(void); _CRTIMP wchar_t ***__cdecl __p___wargv(void); _CRTIMP char ***__cdecl __p__environ(void); _CRTIMP wchar_t ***__cdecl __p__wenviron(void); _CRTIMP char **__cdecl __p__pgmptr(void); _CRTIMP wchar_t **__cdecl __p__wpgmptr(void); #endif #ifndef __argc #ifdef _MSVCRT_ extern int __argc; #else extern int * __MINGW_IMP_SYMBOL(__argc); #define __argc (* __MINGW_IMP_SYMBOL(__argc)) #endif #endif #ifndef __argv #ifdef _MSVCRT_ extern char **__argv; #else extern char *** __MINGW_IMP_SYMBOL(__argv); #define __argv (* __MINGW_IMP_SYMBOL(__argv)) #endif #endif #ifndef __wargv #ifdef _MSVCRT_ extern wchar_t **__wargv; #else extern wchar_t *** __MINGW_IMP_SYMBOL(__wargv); #define __wargv (* __MINGW_IMP_SYMBOL(__wargv)) #endif #endif #ifdef _POSIX_ extern char **environ; #else #ifndef _environ #ifdef _MSVCRT_ extern char **_environ; #else extern char *** __MINGW_IMP_SYMBOL(_environ); #define _environ (* __MINGW_IMP_SYMBOL(_environ)) #endif #endif #ifndef _wenviron #ifdef _MSVCRT_ extern wchar_t **_wenviron; #else extern wchar_t *** __MINGW_IMP_SYMBOL(_wenviron); #define _wenviron (* __MINGW_IMP_SYMBOL(_wenviron)) #endif #endif #endif #ifndef _pgmptr #ifdef _MSVCRT_ extern char *_pgmptr; #else extern char ** __MINGW_IMP_SYMBOL(_pgmptr); #define _pgmptr (* __MINGW_IMP_SYMBOL(_pgmptr)) #endif #endif #ifndef _wpgmptr #ifdef _MSVCRT_ extern wchar_t *_wpgmptr; #else extern wchar_t ** __MINGW_IMP_SYMBOL(_wpgmptr); #define _wpgmptr (* __MINGW_IMP_SYMBOL(_wpgmptr)) #endif #endif errno_t __cdecl _get_pgmptr(char **_Value); errno_t __cdecl _get_wpgmptr(wchar_t **_Value); #ifndef _fmode #ifdef _MSVCRT_ extern int _fmode; #else extern int * __MINGW_IMP_SYMBOL(_fmode); #define _fmode (* __MINGW_IMP_SYMBOL(_fmode)) #endif #endif _CRTIMP errno_t __cdecl _set_fmode(int _Mode); _CRTIMP errno_t __cdecl _get_fmode(int *_PMode); #ifndef _osplatform #ifdef _MSVCRT_ extern unsigned int _osplatform; #else extern unsigned int * __MINGW_IMP_SYMBOL(_osplatform); #define _osplatform (* __MINGW_IMP_SYMBOL(_osplatform)) #endif #endif #ifndef _osver #ifdef _MSVCRT_ extern unsigned int _osver; #else extern unsigned int * __MINGW_IMP_SYMBOL(_osver); #define _osver (* __MINGW_IMP_SYMBOL(_osver)) #endif #endif #ifndef _winver #ifdef _MSVCRT_ extern unsigned int _winver; #else extern unsigned int * __MINGW_IMP_SYMBOL(_winver); #define _winver (* __MINGW_IMP_SYMBOL(_winver)) #endif #endif #ifndef _winmajor #ifdef _MSVCRT_ extern unsigned int _winmajor; #else extern unsigned int * __MINGW_IMP_SYMBOL(_winmajor); #define _winmajor (* __MINGW_IMP_SYMBOL(_winmajor)) #endif #endif #ifndef _winminor #ifdef _MSVCRT_ extern unsigned int _winminor; #else extern unsigned int * __MINGW_IMP_SYMBOL(_winminor); #define _winminor (* __MINGW_IMP_SYMBOL(_winminor)) #endif #endif errno_t __cdecl _get_osplatform(unsigned int *_Value); errno_t __cdecl _get_osver(unsigned int *_Value); errno_t __cdecl _get_winver(unsigned int *_Value); errno_t __cdecl _get_winmajor(unsigned int *_Value); errno_t __cdecl _get_winminor(unsigned int *_Value); #ifndef _countof #ifndef __cplusplus #define _countof(_Array) (sizeof(_Array) / sizeof(_Array[0])) #else extern "C++" { template char (*__countof_helper(UNALIGNED _CountofType (&_Array)[_SizeOfArray]))[_SizeOfArray]; #define _countof(_Array) sizeof(*__countof_helper(_Array)) } #endif #endif #ifndef _CRT_TERMINATE_DEFINED #define _CRT_TERMINATE_DEFINED void __cdecl __MINGW_NOTHROW exit(int _Code) __MINGW_ATTRIB_NORETURN; void __cdecl __MINGW_NOTHROW _exit(int _Code) __MINGW_ATTRIB_NORETURN; #if !defined __NO_ISOCEXT void __cdecl _Exit(int) __MINGW_ATTRIB_NORETURN; #ifndef __CRT__NO_INLINE __CRT_INLINE __MINGW_ATTRIB_NORETURN void __cdecl _Exit(int status) { _exit(status); } #endif #endif #pragma push_macro("abort") #undef abort void __cdecl __declspec(noreturn) abort(void); #pragma pop_macro("abort") #endif _CRTIMP unsigned int __cdecl _set_abort_behavior(unsigned int _Flags,unsigned int _Mask); #ifndef _CRT_ABS_DEFINED #define _CRT_ABS_DEFINED int __cdecl abs(int _X); long __cdecl labs(long _X); #endif __MINGW_EXTENSION __int64 __cdecl _abs64(__int64); #ifdef __MINGW_INTRIN_INLINE __MINGW_INTRIN_INLINE __int64 __cdecl _abs64(__int64 x) { return __builtin_llabs(x); } #endif int __cdecl atexit(void (__cdecl *)(void)); #ifndef _CRT_ATOF_DEFINED #define _CRT_ATOF_DEFINED double __cdecl atof(const char *_String); double __cdecl _atof_l(const char *_String,_locale_t _Locale); #endif int __cdecl atoi(const char *_Str); _CRTIMP int __cdecl _atoi_l(const char *_Str,_locale_t _Locale); long __cdecl atol(const char *_Str); _CRTIMP long __cdecl _atol_l(const char *_Str,_locale_t _Locale); #ifndef _CRT_ALGO_DEFINED #define _CRT_ALGO_DEFINED void *__cdecl bsearch(const void *_Key,const void *_Base,size_t _NumOfElements,size_t _SizeOfElements,int (__cdecl *_PtFuncCompare)(const void *,const void *)); void __cdecl qsort(void *_Base,size_t _NumOfElements,size_t _SizeOfElements,int (__cdecl *_PtFuncCompare)(const void *,const void *)); #endif unsigned short __cdecl _byteswap_ushort(unsigned short _Short); unsigned long __cdecl _byteswap_ulong (unsigned long _Long); __MINGW_EXTENSION unsigned __int64 __cdecl _byteswap_uint64(unsigned __int64 _Int64); div_t __cdecl div(int _Numerator,int _Denominator); char *__cdecl getenv(const char *_VarName) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; _CRTIMP char *__cdecl _itoa(int _Value,char *_Dest,int _Radix); __MINGW_EXTENSION _CRTIMP char *__cdecl _i64toa(__int64 _Val,char *_DstBuf,int _Radix) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; __MINGW_EXTENSION _CRTIMP char *__cdecl _ui64toa(unsigned __int64 _Val,char *_DstBuf,int _Radix) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; __MINGW_EXTENSION _CRTIMP __int64 __cdecl _atoi64(const char *_String); __MINGW_EXTENSION _CRTIMP __int64 __cdecl _atoi64_l(const char *_String,_locale_t _Locale); __MINGW_EXTENSION _CRTIMP __int64 __cdecl _strtoi64(const char *_String,char **_EndPtr,int _Radix); __MINGW_EXTENSION _CRTIMP __int64 __cdecl _strtoi64_l(const char *_String,char **_EndPtr,int _Radix,_locale_t _Locale); __MINGW_EXTENSION _CRTIMP unsigned __int64 __cdecl _strtoui64(const char *_String,char **_EndPtr,int _Radix); __MINGW_EXTENSION _CRTIMP unsigned __int64 __cdecl _strtoui64_l(const char *_String,char **_EndPtr,int _Radix,_locale_t _Locale); ldiv_t __cdecl ldiv(long _Numerator,long _Denominator); _CRTIMP char *__cdecl _ltoa(long _Value,char *_Dest,int _Radix) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; int __cdecl mblen(const char *_Ch,size_t _MaxCount); _CRTIMP int __cdecl _mblen_l(const char *_Ch,size_t _MaxCount,_locale_t _Locale); _CRTIMP size_t __cdecl _mbstrlen(const char *_Str); _CRTIMP size_t __cdecl _mbstrlen_l(const char *_Str,_locale_t _Locale); _CRTIMP size_t __cdecl _mbstrnlen(const char *_Str,size_t _MaxCount); _CRTIMP size_t __cdecl _mbstrnlen_l(const char *_Str,size_t _MaxCount,_locale_t _Locale); int __cdecl mbtowc(wchar_t * __restrict__ _DstCh,const char * __restrict__ _SrcCh,size_t _SrcSizeInBytes); _CRTIMP int __cdecl _mbtowc_l(wchar_t * __restrict__ _DstCh,const char * __restrict__ _SrcCh,size_t _SrcSizeInBytes,_locale_t _Locale); size_t __cdecl mbstowcs(wchar_t * __restrict__ _Dest,const char * __restrict__ _Source,size_t _MaxCount); _CRTIMP size_t __cdecl _mbstowcs_l(wchar_t * __restrict__ _Dest,const char * __restrict__ _Source,size_t _MaxCount,_locale_t _Locale); int __cdecl rand(void); _CRTIMP int __cdecl _set_error_mode(int _Mode); void __cdecl srand(unsigned int _Seed); #ifdef _CRT_RAND_S _CRTIMP errno_t __cdecl rand_s(unsigned int *randomValue); #endif #if defined(__USE_MINGW_STRTOX) __mingw_ovr double __cdecl __MINGW_NOTHROW strtod(const char * __restrict__ _Str,char ** __restrict__ _EndPtr) { double __cdecl __mingw_strtod (const char * __restrict__, char ** __restrict__); return __mingw_strtod( _Str, _EndPtr); } __mingw_ovr float __cdecl __MINGW_NOTHROW strtof(const char * __restrict__ _Str,char ** __restrict__ _EndPtr) { float __cdecl __mingw_strtof (const char * __restrict__, char ** __restrict__); return __mingw_strtof( _Str, _EndPtr); } #else double __cdecl __MINGW_NOTHROW strtod(const char * __restrict__ _Str,char ** __restrict__ _EndPtr); float __cdecl __MINGW_NOTHROW strtof(const char * __restrict__ nptr, char ** __restrict__ endptr); #endif long double __cdecl __MINGW_NOTHROW strtold(const char * __restrict__ , char ** __restrict__ ); #if !defined __NO_ISOCEXT extern double __cdecl __MINGW_NOTHROW __strtod (const char * __restrict__ , char ** __restrict__); #define strtod __strtod #endif #if !defined __NO_ISOCEXT float __cdecl __mingw_strtof (const char * __restrict__, char ** __restrict__); double __cdecl __mingw_strtod (const char * __restrict__, char ** __restrict__); long double __cdecl __mingw_strtold(const char * __restrict__, char ** __restrict__); #endif _CRTIMP double __cdecl _strtod_l(const char * __restrict__ _Str,char ** __restrict__ _EndPtr,_locale_t _Locale); long __cdecl strtol(const char * __restrict__ _Str,char ** __restrict__ _EndPtr,int _Radix); _CRTIMP long __cdecl _strtol_l(const char * __restrict__ _Str,char ** __restrict__ _EndPtr,int _Radix,_locale_t _Locale); unsigned long __cdecl strtoul(const char * __restrict__ _Str,char ** __restrict__ _EndPtr,int _Radix); _CRTIMP unsigned long __cdecl _strtoul_l(const char * __restrict__ _Str,char ** __restrict__ _EndPtr,int _Radix,_locale_t _Locale); #ifndef _CRT_SYSTEM_DEFINED #define _CRT_SYSTEM_DEFINED int __cdecl system(const char *_Command); #endif _CRTIMP char *__cdecl _ultoa(unsigned long _Value,char *_Dest,int _Radix) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; int __cdecl wctomb(char *_MbCh,wchar_t _WCh) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; _CRTIMP int __cdecl _wctomb_l(char *_MbCh,wchar_t _WCh,_locale_t _Locale) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; size_t __cdecl wcstombs(char * __restrict__ _Dest,const wchar_t * __restrict__ _Source,size_t _MaxCount) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; _CRTIMP size_t __cdecl _wcstombs_l(char * __restrict__ _Dest,const wchar_t * __restrict__ _Source,size_t _MaxCount,_locale_t _Locale) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; #ifndef _CRT_ALLOCATION_DEFINED #define _CRT_ALLOCATION_DEFINED void *__cdecl calloc(size_t _NumOfElements,size_t _SizeOfElements); void __cdecl free(void *_Memory); void *__cdecl malloc(size_t _Size); void *__cdecl realloc(void *_Memory,size_t _NewSize); _CRTIMP void *__cdecl _recalloc(void *_Memory,size_t _Count,size_t _Size); #if (!defined (_XMMINTRIN_H_INCLUDED) && !defined (_MM_MALLOC_H_INCLUDED)) || defined(_aligned_malloc) #pragma push_macro("_aligned_free") #pragma push_macro("_aligned_malloc") #undef _aligned_free #undef _aligned_malloc _CRTIMP void __cdecl _aligned_free(void *_Memory); _CRTIMP void *__cdecl _aligned_malloc(size_t _Size,size_t _Alignment); #pragma pop_macro("_aligned_free") #pragma pop_macro("_aligned_malloc") #endif _CRTIMP void *__cdecl _aligned_offset_malloc(size_t _Size,size_t _Alignment,size_t _Offset); _CRTIMP void *__cdecl _aligned_realloc(void *_Memory,size_t _Size,size_t _Alignment); _CRTIMP void *__cdecl _aligned_recalloc(void *_Memory,size_t _Count,size_t _Size,size_t _Alignment); _CRTIMP void *__cdecl _aligned_offset_realloc(void *_Memory,size_t _Size,size_t _Alignment,size_t _Offset); _CRTIMP void *__cdecl _aligned_offset_recalloc(void *_Memory,size_t _Count,size_t _Size,size_t _Alignment,size_t _Offset); #endif #ifndef _WSTDLIB_DEFINED #define _WSTDLIB_DEFINED _CRTIMP wchar_t *__cdecl _itow(int _Value,wchar_t *_Dest,int _Radix) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; _CRTIMP wchar_t *__cdecl _ltow(long _Value,wchar_t *_Dest,int _Radix) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; _CRTIMP wchar_t *__cdecl _ultow(unsigned long _Value,wchar_t *_Dest,int _Radix) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; double __cdecl __mingw_wcstod(const wchar_t * __restrict__ _Str,wchar_t ** __restrict__ _EndPtr); float __cdecl __mingw_wcstof(const wchar_t * __restrict__ nptr, wchar_t ** __restrict__ endptr); long double __cdecl __mingw_wcstold(const wchar_t * __restrict__, wchar_t ** __restrict__); #if defined(__USE_MINGW_STRTOX) __mingw_ovr double __cdecl wcstod(const wchar_t * __restrict__ _Str,wchar_t ** __restrict__ _EndPtr){ return __mingw_wcstod(_Str,_EndPtr); } __mingw_ovr float __cdecl wcstof(const wchar_t * __restrict__ _Str,wchar_t ** __restrict__ _EndPtr){ return __mingw_wcstof(_Str,_EndPtr); } #else double __cdecl wcstod(const wchar_t * __restrict__ _Str,wchar_t ** __restrict__ _EndPtr); float __cdecl wcstof(const wchar_t * __restrict__ nptr, wchar_t ** __restrict__ endptr); #endif #if !defined __NO_ISOCEXT long double __cdecl wcstold(const wchar_t * __restrict__, wchar_t ** __restrict__); #endif _CRTIMP double __cdecl _wcstod_l(const wchar_t * __restrict__ _Str,wchar_t ** __restrict__ _EndPtr,_locale_t _Locale); long __cdecl wcstol(const wchar_t * __restrict__ _Str,wchar_t ** __restrict__ _EndPtr,int _Radix); _CRTIMP long __cdecl _wcstol_l(const wchar_t * __restrict__ _Str,wchar_t ** __restrict__ _EndPtr,int _Radix,_locale_t _Locale); unsigned long __cdecl wcstoul(const wchar_t * __restrict__ _Str,wchar_t ** __restrict__ _EndPtr,int _Radix); _CRTIMP unsigned long __cdecl _wcstoul_l(const wchar_t * __restrict__ _Str,wchar_t ** __restrict__ _EndPtr,int _Radix,_locale_t _Locale); _CRTIMP wchar_t *__cdecl _wgetenv(const wchar_t *_VarName) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; #ifndef _CRT_WSYSTEM_DEFINED #define _CRT_WSYSTEM_DEFINED _CRTIMP int __cdecl _wsystem(const wchar_t *_Command); #endif _CRTIMP double __cdecl _wtof(const wchar_t *_Str); _CRTIMP double __cdecl _wtof_l(const wchar_t *_Str,_locale_t _Locale); _CRTIMP int __cdecl _wtoi(const wchar_t *_Str); _CRTIMP int __cdecl _wtoi_l(const wchar_t *_Str,_locale_t _Locale); _CRTIMP long __cdecl _wtol(const wchar_t *_Str); _CRTIMP long __cdecl _wtol_l(const wchar_t *_Str,_locale_t _Locale); __MINGW_EXTENSION _CRTIMP wchar_t *__cdecl _i64tow(__int64 _Val,wchar_t *_DstBuf,int _Radix) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; __MINGW_EXTENSION _CRTIMP wchar_t *__cdecl _ui64tow(unsigned __int64 _Val,wchar_t *_DstBuf,int _Radix) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; __MINGW_EXTENSION _CRTIMP __int64 __cdecl _wtoi64(const wchar_t *_Str); __MINGW_EXTENSION _CRTIMP __int64 __cdecl _wtoi64_l(const wchar_t *_Str,_locale_t _Locale); __MINGW_EXTENSION _CRTIMP __int64 __cdecl _wcstoi64(const wchar_t *_Str,wchar_t **_EndPtr,int _Radix); __MINGW_EXTENSION _CRTIMP __int64 __cdecl _wcstoi64_l(const wchar_t *_Str,wchar_t **_EndPtr,int _Radix,_locale_t _Locale); __MINGW_EXTENSION _CRTIMP unsigned __int64 __cdecl _wcstoui64(const wchar_t *_Str,wchar_t **_EndPtr,int _Radix); __MINGW_EXTENSION _CRTIMP unsigned __int64 __cdecl _wcstoui64_l(const wchar_t *_Str ,wchar_t **_EndPtr,int _Radix,_locale_t _Locale); #endif #ifndef _POSIX_ #define _CVTBUFSIZE (309+40) _CRTIMP char *__cdecl _fullpath(char *_FullPath,const char *_Path,size_t _SizeInBytes); _CRTIMP char *__cdecl _ecvt(double _Val,int _NumOfDigits,int *_PtDec,int *_PtSign) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; _CRTIMP char *__cdecl _fcvt(double _Val,int _NumOfDec,int *_PtDec,int *_PtSign) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; _CRTIMP char *__cdecl _gcvt(double _Val,int _NumOfDigits,char *_DstBuf) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; _CRTIMP int __cdecl _atodbl(_CRT_DOUBLE *_Result,char *_Str); _CRTIMP int __cdecl _atoldbl(_LDOUBLE *_Result,char *_Str); _CRTIMP int __cdecl _atoflt(_CRT_FLOAT *_Result,char *_Str); _CRTIMP int __cdecl _atodbl_l(_CRT_DOUBLE *_Result,char *_Str,_locale_t _Locale); _CRTIMP int __cdecl _atoldbl_l(_LDOUBLE *_Result,char *_Str,_locale_t _Locale); _CRTIMP int __cdecl _atoflt_l(_CRT_FLOAT *_Result,char *_Str,_locale_t _Locale); #pragma push_macro ("_lrotr") #pragma push_macro ("_lrotl") #undef _lrotr #undef _lrotl #ifdef __x86_64__ __MINGW_EXTENSION unsigned long long __cdecl _lrotl(unsigned long long _Val,int _Shift); __MINGW_EXTENSION unsigned long long __cdecl _lrotr(unsigned long long _Val,int _Shift); #else unsigned long __cdecl _lrotl(unsigned long _Val,int _Shift); unsigned long __cdecl _lrotr(unsigned long _Val,int _Shift); #endif #pragma pop_macro ("_lrotl") #pragma pop_macro ("_lrotr") _CRTIMP void __cdecl _makepath(char *_Path,const char *_Drive,const char *_Dir,const char *_Filename,const char *_Ext); _onexit_t __cdecl _onexit(_onexit_t _Func); #ifndef _CRT_PERROR_DEFINED #define _CRT_PERROR_DEFINED void __cdecl perror(const char *_ErrMsg); #endif _CRTIMP int __cdecl _putenv(const char *_EnvString); #pragma push_macro ("_rotr64") #pragma push_macro ("_rotl64") #undef _rotl64 #undef _rotr64 __MINGW_EXTENSION unsigned __int64 __cdecl _rotl64(unsigned __int64 _Val,int _Shift); __MINGW_EXTENSION unsigned __int64 __cdecl _rotr64(unsigned __int64 Value,int Shift); #pragma pop_macro ("_rotl64") #pragma pop_macro ("_rotr64") #pragma push_macro ("_rotr") #pragma push_macro ("_rotl") #undef _rotr #undef _rotl unsigned int __cdecl _rotr(unsigned int _Val,int _Shift); unsigned int __cdecl _rotl(unsigned int _Val,int _Shift); #pragma pop_macro ("_rotl") #pragma pop_macro ("_rotr") __MINGW_EXTENSION unsigned __int64 __cdecl _rotr64(unsigned __int64 _Val,int _Shift); _CRTIMP void __cdecl _searchenv(const char *_Filename,const char *_EnvVar,char *_ResultPath) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; _CRTIMP void __cdecl _splitpath(const char *_FullPath,char *_Drive,char *_Dir,char *_Filename,char *_Ext) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; _CRTIMP void __cdecl _swab(char *_Buf1,char *_Buf2,int _SizeInBytes); #ifndef _WSTDLIBP_DEFINED #define _WSTDLIBP_DEFINED _CRTIMP wchar_t *__cdecl _wfullpath(wchar_t *_FullPath,const wchar_t *_Path,size_t _SizeInWords); _CRTIMP void __cdecl _wmakepath(wchar_t *_ResultPath,const wchar_t *_Drive,const wchar_t *_Dir,const wchar_t *_Filename,const wchar_t *_Ext); #ifndef _CRT_WPERROR_DEFINED #define _CRT_WPERROR_DEFINED _CRTIMP void __cdecl _wperror(const wchar_t *_ErrMsg); #endif _CRTIMP int __cdecl _wputenv(const wchar_t *_EnvString); _CRTIMP void __cdecl _wsearchenv(const wchar_t *_Filename,const wchar_t *_EnvVar,wchar_t *_ResultPath) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; _CRTIMP void __cdecl _wsplitpath(const wchar_t *_FullPath,wchar_t *_Drive,wchar_t *_Dir,wchar_t *_Filename,wchar_t *_Ext) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; #endif _CRTIMP void __cdecl _beep(unsigned _Frequency,unsigned _Duration) __MINGW_ATTRIB_DEPRECATED; _CRTIMP void __cdecl _seterrormode(int _Mode) __MINGW_ATTRIB_DEPRECATED; _CRTIMP void __cdecl _sleep(unsigned long _Duration) __MINGW_ATTRIB_DEPRECATED; #endif #ifndef NO_OLDNAMES #ifndef _POSIX_ #if 0 #ifndef __cplusplus #ifndef NOMINMAX #ifndef max #define max(a,b) (((a) > (b)) ? (a) : (b)) #endif #ifndef min #define min(a,b) (((a) < (b)) ? (a) : (b)) #endif #endif #endif #endif #define sys_errlist _sys_errlist #define sys_nerr _sys_nerr #define environ _environ char *__cdecl ecvt(double _Val,int _NumOfDigits,int *_PtDec,int *_PtSign) __MINGW_ATTRIB_DEPRECATED_MSVC2005; char *__cdecl fcvt(double _Val,int _NumOfDec,int *_PtDec,int *_PtSign) __MINGW_ATTRIB_DEPRECATED_MSVC2005; char *__cdecl gcvt(double _Val,int _NumOfDigits,char *_DstBuf) __MINGW_ATTRIB_DEPRECATED_MSVC2005; char *__cdecl itoa(int _Val,char *_DstBuf,int _Radix) __MINGW_ATTRIB_DEPRECATED_MSVC2005; char *__cdecl ltoa(long _Val,char *_DstBuf,int _Radix) __MINGW_ATTRIB_DEPRECATED_MSVC2005; int __cdecl putenv(const char *_EnvString) __MINGW_ATTRIB_DEPRECATED_MSVC2005; #ifndef _CRT_SWAB_DEFINED #define _CRT_SWAB_DEFINED void __cdecl swab(char *_Buf1,char *_Buf2,int _SizeInBytes) __MINGW_ATTRIB_DEPRECATED_MSVC2005; #endif char *__cdecl ultoa(unsigned long _Val,char *_Dstbuf,int _Radix) __MINGW_ATTRIB_DEPRECATED_MSVC2005; onexit_t __cdecl onexit(onexit_t _Func); #endif #endif #if !defined __NO_ISOCEXT typedef struct { __MINGW_EXTENSION long long quot, rem; } lldiv_t; __MINGW_EXTENSION lldiv_t __cdecl lldiv(long long, long long); __MINGW_EXTENSION long long __cdecl llabs(long long); #ifndef __CRT__NO_INLINE __MINGW_EXTENSION __CRT_INLINE long long __cdecl llabs(long long _j) { return (_j >= 0 ? _j : -_j); } #endif __MINGW_EXTENSION long long __cdecl strtoll(const char * __restrict__, char ** __restrict, int); __MINGW_EXTENSION unsigned long long __cdecl strtoull(const char * __restrict__, char ** __restrict__, int); __MINGW_EXTENSION long long __cdecl atoll (const char *); #ifndef __STRICT_ANSI__ __MINGW_EXTENSION long long __cdecl wtoll (const wchar_t *); __MINGW_EXTENSION char *__cdecl lltoa (long long, char *, int); __MINGW_EXTENSION char *__cdecl ulltoa (unsigned long long , char *, int); __MINGW_EXTENSION wchar_t *__cdecl lltow (long long, wchar_t *, int); __MINGW_EXTENSION wchar_t *__cdecl ulltow (unsigned long long, wchar_t *, int); #ifndef __CRT__NO_INLINE __MINGW_EXTENSION __CRT_INLINE long long __cdecl atoll (const char * _c) { return _atoi64 (_c); } __MINGW_EXTENSION __CRT_INLINE char *__cdecl lltoa (long long _n, char * _c, int _i) { return _i64toa (_n, _c, _i); } __MINGW_EXTENSION __CRT_INLINE char *__cdecl ulltoa (unsigned long long _n, char * _c, int _i) { return _ui64toa (_n, _c, _i); } __MINGW_EXTENSION __CRT_INLINE long long __cdecl wtoll (const wchar_t * _w) { return _wtoi64 (_w); } __MINGW_EXTENSION __CRT_INLINE wchar_t *__cdecl lltow (long long _n, wchar_t * _w, int _i) { return _i64tow (_n, _w, _i); } __MINGW_EXTENSION __CRT_INLINE wchar_t *__cdecl ulltow (unsigned long long _n, wchar_t * _w, int _i) { return _ui64tow (_n, _w, _i); } #endif #endif #endif #ifdef __cplusplus } #endif #pragma pack(pop) #include #include #endif
输入样式：C语言模式：#include
C++样式：#include
1函数名称:calloc
函数原型: void * calloc(unsigned n,unsigned size);
函数功能: 分配n个数据项的内存连续空间,每个数据项的大小为 size
函数返回: 分配内存单元的起始地址,如果不成功,返回0
2函数名称:free
函数原型: void free(void* p);
函数功能: 释放 p 所指的内存区
函数返回:
参数说明: p- 被释放的指针
3函数名称:malloc
函数原型: void * malloc(unsigned size);
函数功能: 分配 size 字节的存储区
函数返回: 所分配的内存区地址,如果内存不够,返回0
4函数名称: realloc
函数原型: void * realloc(void * p,unsigned size);
函数功能: 将 p 所指出的已分配内存区的大小改为 size,size 可以比原来分配的空间大或小
函数返回: 返回指向该内存区的指针.NULL-分配失败
5函数名称: rand
函数原型: int rand(void);
函数功能: 产生0到32767间的随机整数(0到0x7fff之间)
函数返回: 随机整数
6函数名称: abort
函数原型: void abort(void)
函数功能: 异常终止一个进程.
7函数名称: exit
函数原型: void exit(int state)
函数功能: 程序中止执行，返回调用过程
函数返回:
参数说明: state:0- 正常中止，非 0- 非正常中止
8函数名称: getenv
函数原型: char* getenv(const char *name)
函数功能: 返回一个指向环境变量的指针
函数返回:环境变量的定义
参数说明: name- 环境字符串
9函数名称: putenv
函数原型: int putenv(const char *name)
函数功能: 将字符串name增加到DOS环境变量中
函数返回: 0:操作成功，-1:操作失败
参数说明: name-环境字符串
10函数名称: labs
函数原型: long labs(long num)
函数功能: 求长整型参数的绝对值
函数返回:绝对值
11函数名称: atof
函数原型: double atof(char *str)
函数功能: 将字符串转换成一个双精度数值
函数返回: 转换后的数值
参数说明: str- 待转换浮点型数的字符串
12函数名称: atoi
函数原型: int atoi(char *str)
函数功能: 将字符串转换成一个整数值
函数返回: 转换后的数值
参数说明: str- 待转换为整型数的字符串
13函数名称: atol
函数原型: long atol(char *str)
函数功能: 将字符串转换成一个长整数
函数返回: 转换后的数值
参数说明: str- 待转换为长整型的字符串
14函数名称:ecvt
函数原型: char *ecvt(double value,int ndigit,int *dec,int *sign)
函数功能: 将浮点数转换为字符串
函数返回: 转换后的字符串指针
参数说明: value- 待转换底浮点数，ndigit- 转换后的字符串长度
15函数名称:fcvt
函数原型: char *fcvt(double value,int ndigit,int *dec,int *sign)
函数功能: 将浮点数变成一个字符串
函数返回: 转换后字符串指针
参数说明: value- 待转换底浮点数，ndigit- 转换后底字符串长度
常用的也就是abs，exit和rand,其他根本不用记。
