memcpy
copy memory area
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INTERFACE
#include <string.h>
void memcpy ( void *dst, const void *src, size_t len )DESCRIPTION
The memcpy function copies len bytes from memory area src to memory area dst. If src and dst overlap, behavior is undefined. Applications in which src and dst might overlap should use memmove instead.
Example 1
Workings
\code #include <stdio.h> #include <string.h> int main() { // define two arrays u, v and initialize u int u[5] = {1, 2, 3, 4, 5}, v[5]; // copy u to v memcpy(v, u, 5*sizeof(int)); // display v for (int i = 0; i < 5; ++i) printf("v[%d] = %d
", i, v[i]); return 0; } \endcode
Solution
Output:
v[0] = 1
v[1] = 2
v[2] = 3
v[3] = 4
v[4] = 5RETURN VALUES
The memcpy function returns the original value of dst.