Optimal way to perform a shift operation on an array

Question

Suppose I have an array

unsigned char arr[]= {0,1,2,3,4,5,6,7,8,9};

Is there a way to perform shift operation on them besides just copying them

Answer 1

If you want a circular shift of the elements:

std::rotate(&arr[0], &arr[1], &arr[10]);

... will do the trick. You'll need to #include the algorithm header.