下面是VC中stdio.h里面的内容,参考下怎么写吧:
/***
*string.h - declarations for string manipulation functions
*
*
Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
*
This file contains the function declarations for the string
*
manipulation functions.
*
[ANSI/System V]
*
*
[Public]
*
****/
#if
_MSC_VER > 1000
#pragma once
#endif
#ifndef _INC_STRING
#define _INC_STRING
#if
!defined(_WIN32) && !defined(_MAC)
#error ERROR: Only Mac or Win32 targets supported!
#endif
#ifdef
__cplusplus
extern "C" {
#endif
/* Define _CRTIMP */
#ifndef _CRTIMP
#ifdef
_DLL
#define _CRTIMP __declspec(dllimport)
#else
/* ndef _DLL */
#define _CRTIMP
#endif
/* _DLL */
#endif
/* _CRTIMP */
/* Define __cdecl for non-Microsoft compilers */
#if
( !defined(_MSC_VER) && !defined(__cdecl) )
#define __cdecl
#endif
/* Define _CRTAPI1 (for compatibility with the NT SDK) */
#ifndef _CRTAPI1
#if
_MSC_VER >= 800 && _M_IX86 >= 300
#define _CRTAPI1 __cdecl
#else
#define _CRTAPI1
#endif
#endif
#ifndef _SIZE_T_DEFINED
typedef unsigned int size_t;
#define _SIZE_T_DEFINED
#endif
#ifndef _MAC
#ifndef _WCHAR_T_DEFINED
typedef unsigned short wchar_t;
#define _WCHAR_T_DEFINED
#endif
#endif
/* ndef _MAC */
#ifndef _NLSCMP_DEFINED
#define _NLSCMPERROR
2147483647
/* currently == INT_MAX */
#define _NLSCMP_DEFINED
#endif
/* Define NULL pointer value */
#ifndef NULL
#ifdef __cplusplus
#define NULL
0
#else
#define NULL
((void *)0)
#endif
#endif
/* Function prototypes */
#ifdef
_M_MRX000
_CRTIMP void *
__cdecl memcpy(void *, const void *, size_t);
_CRTIMP int
__cdecl memcmp(const void *, const void *, size_t);
_CRTIMP void *
__cdecl memset(void *, int, size_t);
_CRTIMP char *
__cdecl _strset(char *, int);
_CRTIMP char *
__cdecl strcpy(char *, const char *);
_CRTIMP char *
__cdecl strcat(char *, const char *);
_CRTIMP int
__cdecl strcmp(const char *, const char *);
_CRTIMP size_t
__cdecl strlen(const char *);
#else
void *
__cdecl memcpy(void *, const void *, size_t);
int
__cdecl memcmp(const void *, const void *, size_t);
void *
__cdecl memset(void *, int, size_t);
char *
__cdecl _strset(char *, int);
char *
__cdecl strcpy(char *, const char *);
char *
__cdecl strcat(char *, const char *);
int
__cdecl strcmp(const char *, const char *);
size_t
__cdecl strlen(const char *);
#endif
_CRTIMP void *
__cdecl _memccpy(void *, const void *, int, unsigned int);
_CRTIMP void *
__cdecl memchr(const void *, int, size_t);
_CRTIMP int
__cdecl _memicmp(const void *, const void *, unsigned int);
#ifdef
_M_ALPHA
/* memmove is available as an intrinsic in the Alpha compiler */
void *
__cdecl memmove(void *, const void *, size_t);
#else
_CRTIMP void *
__cdecl memmove(void *, const void *, size_t);
#endif
_CRTIMP char *
__cdecl strchr(const char *, int);
_CRTIMP int
__cdecl _strcmpi(const char *, const char *);
_CRTIMP int
__cdecl _stricmp(const char *, const char *);
_CRTIMP int
__cdecl strcoll(const char *, const char *);
_CRTIMP int
__cdecl _stricoll(const char *, const char *);
_CRTIMP int
__cdecl _strncoll(const char *, const char *, size_t);
_CRTIMP int
__cdecl _strnicoll(const char *, const char *, size_t);
_CRTIMP size_t
__cdecl strcspn(const char *, const char *);
_CRTIMP char *
__cdecl _strdup(const char *);
_CRTIMP char *
__cdecl _strerror(const char *);
_CRTIMP char *
__cdecl strerror(int);
_CRTIMP char *
__cdecl _strlwr(char *);
_CRTIMP char *
__cdecl strncat(char *, const char *, size_t);
_CRTIMP int
__cdecl strncmp(const char *, const char *, size_t);
_CRTIMP int
__cdecl _strnicmp(const char *, const char *, size_t);
_CRTIMP char *
__cdecl strncpy(char *, const char *, size_t);
_CRTIMP char *
__cdecl _strnset(char *, int, size_t);
_CRTIMP char *
__cdecl strpbrk(const char *, const char *);
_CRTIMP char *
__cdecl strrchr(const char *, int);
_CRTIMP char *
__cdecl _strrev(char *);
_CRTIMP size_t
__cdecl strspn(const char *, const char *);
_CRTIMP char *
__cdecl strstr(const char *, const char *);
_CRTIMP char *
__cdecl strtok(char *, const char *);
_CRTIMP char *
__cdecl _strupr(char *);
_CRTIMP size_t
__cdecl strxfrm (char *, const char *, size_t);
#ifdef
_MAC
unsigned char * __cdecl _c2pstr(char *);
char * __cdecl _p2cstr(unsigned char *);
#if
!__STDC__
__inline unsigned char * __cdecl c2pstr(char *sz) { return _c2pstr(sz);};
__inline char * __cdecl p2cstr(unsigned char *sz) { return _p2cstr(sz);};
#endif
#endif
#if
!__STDC__
/* prototypes for oldnames.lib functions */
_CRTIMP void * __cdecl memccpy(void *, const void *, int, unsigned int);
_CRTIMP int __cdecl memicmp(const void *, const void *, unsigned int);
_CRTIMP int __cdecl strcmpi(const char *, const char *);
_CRTIMP int __cdecl stricmp(const char *, const char *);
_CRTIMP char * __cdecl strdup(const char *);
_CRTIMP char * __cdecl strlwr(char *);
_CRTIMP int __cdecl strnicmp(const char *, const char *, size_t);
_CRTIMP char * __cdecl strnset(char *, int, size_t);
_CRTIMP char * __cdecl strrev(char *);
char * __cdecl strset(char *, int);
_CRTIMP char * __cdecl strupr(char *);
#endif
/* !__STDC__ */
#ifndef _MAC
#ifndef _WSTRING_DEFINED
/* wide function prototypes, also declared in wchar.h
*/
_CRTIMP wchar_t * __cdecl wcscat(wchar_t *, const wchar_t *);
_CRTIMP wchar_t * __cdecl wcschr(const wchar_t *, wchar_t);
_CRTIMP int __cdecl wcscmp(const wchar_t *, const wchar_t *);
_CRTIMP wchar_t * __cdecl wcscpy(wchar_t *, const wchar_t *);
_CRTIMP size_t __cdecl wcscspn(const wchar_t *, const wchar_t *);
_CRTIMP size_t __cdecl wcslen(const wchar_t *);
_CRTIMP wchar_t * __cdecl wcsncat(wchar_t *, const wchar_t *, size_t);
_CRTIMP int __cdecl wcsncmp(const wchar_t *, const wchar_t *, size_t);
_CRTIMP wchar_t * __cdecl wcsncpy(wchar_t *, const wchar_t *, size_t);
_CRTIMP wchar_t * __cdecl wcspbrk(const wchar_t *, const wchar_t *);
_CRTIMP wchar_t * __cdecl wcsrchr(const wchar_t *, wchar_t);
_CRTIMP size_t __cdecl wcsspn(const wchar_t *, const wchar_t *);
_CRTIMP wchar_t * __cdecl wcsstr(const wchar_t *, const wchar_t *);
_CRTIMP wchar_t * __cdecl wcstok(wchar_t *, const wchar_t *);
_CRTIMP wchar_t * __cdecl _wcsdup(const wchar_t *);
_CRTIMP int __cdecl _wcsicmp(const wchar_t *, const wchar_t *);
_CRTIMP int __cdecl _wcsnicmp(const wchar_t *, const wchar_t *, size_t);
_CRTIMP wchar_t * __cdecl _wcsnset(wchar_t *, wchar_t, size_t);
_CRTIMP wchar_t * __cdecl _wcsrev(wchar_t *);
_CRTIMP wchar_t * __cdecl _wcsset(wchar_t *, wchar_t);
_CRTIMP wchar_t * __cdecl _wcslwr(wchar_t *);
_CRTIMP wchar_t * __cdecl _wcsupr(wchar_t *);
_CRTIMP size_t __cdecl wcsxfrm(wchar_t *, const wchar_t *, size_t);
_CRTIMP int __cdecl wcscoll(const wchar_t *, const wchar_t *);
_CRTIMP int __cdecl _wcsicoll(const wchar_t *, const wchar_t *);
_CRTIMP int __cdecl _wcsncoll(const wchar_t *, const wchar_t *, size_t);
_CRTIMP int __cdecl _wcsnicoll(const wchar_t *, const wchar_t *, size_t);
#if
!__STDC__
/* old names */
#define wcswcs wcsstr
/* prototypes for oldnames.lib functions */
_CRTIMP wchar_t * __cdecl wcsdup(const wchar_t *);
_CRTIMP int __cdecl wcsicmp(const wchar_t *, const wchar_t *);
_CRTIMP int __cdecl wcsnicmp(const wchar_t *, const wchar_t *, size_t);
_CRTIMP wchar_t * __cdecl wcsnset(wchar_t *, wchar_t, size_t);
_CRTIMP wchar_t * __cdecl wcsrev(wchar_t *);
_CRTIMP wchar_t * __cdecl wcsset(wchar_t *, wchar_t);
_CRTIMP wchar_t * __cdecl wcslwr(wchar_t *);
_CRTIMP wchar_t * __cdecl wcsupr(wchar_t *);
_CRTIMP int __cdecl wcsicoll(const wchar_t *, const wchar_t *);
#endif
/* !__STDC__ */
#define _WSTRING_DEFINED
#endif
#endif
/* ndef _MAC */
#ifdef
__cplusplus
}
#endif
#endif
/* _INC_STRING */