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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
);

dest

Pointer to destination.

c

Character to set.

count

Number of characters.

The value of dest.

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.

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.

// 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 );
}

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 );
}

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

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