memcpy - copy bytes in memory

Syntax	#include <string.h> void *memcpy(void *s1, const void *s2, size_t n);
Description	memcpy() copies the first n bytes of the memory area to which s2 points into the memory area pointed to by s1. s1 is a pointer to the memory area to which the bytes are to be copied. s2 is a pointer to the memory area from which the first n bytes are to be copied. n is an integer value that specifies the number of bytes in s2 to be copied.
Return val.	Pointer to the memory area s1
		successful.
Notes	This function is suitable for processing character arrays, which, in contrast to character strings, need not be terminated by the null byte (\0). memcpy() does not check whether data in result area s1 is in danger of being overwritten. The behavior is undefined if memory areas overlap.
See also	memccpy(), memchr(), memcmp(), memset(), string.h.