memcpy, _wmemcpy
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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++ | |
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memcpy |
+ |
+ |
+ |
+ |
_wmemcpy |
+ |