memset, wmemset

Sets buffers to a specified character.

void *memset(
   void *dest,
   int c,
   size_t count 
);
wchar_t *wmemset(
   wchar_t *dest,
   wchar_t c,
   size_t count
);

Параметры

• dest
  Pointer to destination.

• c
  Character to set.

• count
  Number of characters.

Возвращаемое значение

The value of dest.

Заметки

Sets the first count characters of dest to the character c.

Security Note Make sure that the destination buffer has enough room for at least count characters. For more information, see Avoiding Buffer Overruns.

Требования

Routine	Required header
memset	<memory.h> or <string.h>
wmemset	<wchar.h>

For additional compatibility information, see Compatibility in the Introduction.

Libraries

All versions of the C run-time libraries.

Пример

// crt_memset.c
/* This program uses memset to
 * set the first four chars of buffer to "*".
 */

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

int main( void )
{
   char buffer[] = "This is a test of the memset function";

   printf( "Before: %s\n", buffer );
   memset( buffer, '*', 4 );
   printf( "After:  %s\n", buffer );
}

Output

Before: This is a test of the memset function
After:  **** is a test of the memset function

Here's an example of the use of wmemset:

// crt_wmemset.c
/* This program uses memset to
 * set the first four chars of buffer to "*".
 */

#include <wchar.h>
#include <stdio.h>

int main( void )
{
   wchar_t buffer[] = L"This is a test of the wmemset function";

   wprintf( L"Before: %s\n", buffer );
   wmemset( buffer, '*', 4 );
   wprintf( L"After:  %s\n", buffer );
}

Output

Before: This is a test of the wmemset function
After:  **** is a test of the wmemset function

Эквивалент в .NET Framework

System::Buffer::SetByte

См. также

Основные понятия

Buffer Manipulation

_memccpy

memchr, wmemchr

memcmp, wmemcmp

memcpy, wmemcpy

_strnset, _strnset_l, _wcsnset, _wcsnset_l, _mbsnset, _mbsnset_l