Swapping objects using pointers

Question

I\'m trying to swap objects for a homework problem that uses void pointers to swap objects. The declaration of my function has to be:

void swap(void *a, voi         


        

Answer 1

To change the pointer inside and keep it outside, you have to pass the pointer by reference or a double pointer.

If your function has to be like:

void swap(void *a, void *b, size_t size);

I suppose that you have to implement something like:

void * temp;
temp = malloc(size);
memcpy(temp,a,size);
memcpy(a,b,size);
memcpy(b,temp,size);
free(temp);