Question

In C++ say we have two arrays:

a[5] = {1,2,3,4,5};
b[5] = {5,4,3,2,1};

If we wanted to set, for instance, a equal to b, how can we achieve that without using a loop?

My thought is to use recursion, but I’m not exactly sure how.

Edit: Sorry, should have made it clear I don’t want to use the standard library functions (including memcpy which some of you have mentioned)

Answer 1

With recursion:

void copy(int *a, int *b, int b_size) {
     if(b_size == 0) return;    
     *a = *b;
     copy(++a, ++b, b_size-1);
}

I don’t understand the need for recursion though, using memcpy() instead is better.