Thread: reagarding function's of <string.h> header file.

Originally Posted by kartik_07

what's the difference between memcpy() and memmove() functions

Refer to the C standard:

Originally Posted by C11 Clause 7.24.2.1

Synopsis

Code:

#include <string.h>
void *memcpy(void * restrict s1, const void * restrict s2, size_t n);

Description
The memcpy function copies n characters from the object pointed to by s2 into the object pointed to by s1. If copying takes place between objects that overlap, the behavior is undefined.

Returns
The memcpy function returns the value of s1.

Originally Posted by C11 Clause 7.24.2.2

Synopsis

Code:

#include <string.h>
void *memmove(void *s1, const void *s2, size_t n);

Description
The memmove function copies n characters from the object pointed to by s2 into the object pointed to by s1. Copying takes place as if the n characters from the object pointed to by s2 are first copied into a temporary array of n characters that does not overlap the objects pointed to by s1 and s2, and then the n characters from the temporary array are copied into the object pointed to by s1.

Returns
The memmove function returns the value of s1.