C++ reference: cstring: memset

memset
void * memset ( void * buffer, int c, size_t num );

string.h

cplusplus.com

Fill buffer with specified character.
Sets the first num bytes pointed by buffer to the value specified by c parameter.

Parameters.

buffer: Pointer to block of data to be filled with c.
c: character value to set.
num: Number of bytes to copy.

Return Value.
buffer is returned.

Portability.
Defined in ANSI-C.

Example.

/* memset example */
#include <stdio.h>
#include <string.h>

main ()
{
  char str[] = "almost every programmer should know memset.";
  memset (str,'-',6);
  puts (str);
  return 0;
}

Output:
------ every programmer should know memset.

See also.
memchr, memcmp, memcpy