Write your own byte-by-byte memcpy.
Build the workhorse of the C standard library:
```c
void *my_memcpy(void *dst, const void *src, size_t n) {
unsigned char *d = dst;
const unsigned char *s = src;
while (n--) *d++ = *s++;
return dst;
}
```
Implement `my_memcpy` exactly with that signature.Sign in to save your code and track progress across devices.
