memcpy, _wmemcpy

Remonter à mem.h - Index

Header File

mem.h, string.h

Category

Memory and String Manipulation Routines, Inline Routines

Prototype

void *memcpy(void *dest, const void *src, size_t n);

void *_wmemcpy(void *dest, const void *src, size_t n);

Description

Copies a block of n bytes.

memcpy is available on UNIX System V systems.

memcpy copies a block of n bytes from src to dest. If src and dest overlap, the behavior of memcpy is undefined.

Return Value

memcpy returns dest.

Example

#include <stdio.h>
#include <string.h>
int main(void)
{
   char src[] = "******************************";
   char dest[] = "abcdefghijlkmnopqrstuvwxyz0123456709";
   char *ptr;
   printf("destination before memcpy: %s\n", dest);
   ptr = (char *) memcpy(dest, src, strlen(src));
   if (ptr)
      printf("destination after memcpy: %s\n", dest);
   else
      printf("memcpy failed\n");
   return 0;
}

Portability

	POSIX	Win32	ANSI C	ANSI C++
memcpy	+	+	+	+
_wmemcpy		+