Memset and memset Functions

Memset and memset Functions
 

NAME

Memset-- Fill a byte string with a byte value

LIBRARY

Standard C Library (libc,-lc)

SYNOPSIS

# Include <String. h>

Void *Memset(Void * B, int c, size_t len)

{

Assert (B! = NULL );

Char * retAddr = (Char*) B;

While (len --> 0)

{

* (RetAddr ++) = (Char) C;

}

Return retAddr;

}

DESCRIPTION

TheMemset() Function writes len bytes of value c (converted to an unsigned char) to the string B.

RETURN VALUES

TheMemset() Function returns its first argument.

NOTES

　　MemsetIs to fill in byte, soVoid * BGenerallyChar *Type.Void * BCan be filled with only two values{0,-1}. Because the computerBinary ComplementNumber,The binary complement of 0 is all 0,-The binary complement of 1 is full 1..