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memset

Syntax

 
#include <string.h>

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

Description

This function stores num copies of ch, starting at buffer. This is often used to initialize objects to a known value, like zero.

Note that, although ch is declared int in the prototype, memset only uses its least-significant byte to fill buffer.

Return Value

buffer

Portability

ANSI/ISO C C89; C99
POSIX 1003.2-1992; 1003.1-2001

Example

 
struct tm t;
memset(&t, 0, sizeof(t));


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