Assigning an entire array with a single statement

Question

Let us say that I declare and initialize

int a[3] = {1, 2, 3};

How can I later asisgn the entire array in one fell swoop? i.e.

Answer 1

If your c compiler supports compound literals, you can use memcpy:

memcpy(a, (int[]){3, 2, 1}, sizeof a);

If you don't plan to stick any variables in there (you can; isn't C99 amazing?), (int[]) can be replaced by (const int[]) to put the literal into static memory.