<string.h>

The <string.h> include file declares the string manipulation functions:

memchr strcat strcspn strncpy strtok
memcmp strchr strerror strpbrk strxfrm
memcpy strcmp strlen strrchr  
memmove strcoll strncat strspn  
memset strcpy strncmp strstr  

In extended mode, <string.h> also defines the following standard extensions:

memccpy strdup strlwr strnset strset
memicmp _strerror strnicmp strrev strupr
strcmpi stricmp      

<string.h> also defines the macro NULL and the type size_t. These definitions are also provided in <stddef.h>. NULL is also defined in <locale.h>.

<string.h>, on OS/2 and Windows, also defines the following far and near pointer macros to the corresponding standard library function:

_fmemccpy _fmemset _fstrdup _fstrncpy _fstrset
_fmemchr _fstrcat _fstricmp _fstrnicmp _fstrspn
_fmemcmp _fstrchr _fstrlen _fstrnset _fstrstr
_fmemcpy _fstrcmp _fstrlwr _fstrpbrk _fstrtok
_fmemicmp _fstrcpy _fstrncat _fstrrchr _fstrupr
_fmemmove _fstrcspn _fstrncmp _fstrrev _nstrdup

On OS/2 and Windows, these macros are also defined in <memory.h>.



<stddef.h>
<memory.h>
<stdlib.h>
<stdio.h>
#include