How to input int64_t / uint64_t constants?

Question

What I\'m trying to do is to define a constant equal to 2^30 (I may change it to something like 2^34, so I prefer to have a room larger than 32 bits for it).

Why the

Answer 1

The syntax you are looking for is:

const uint64_t test = 1ULL << 30;

The post-fix ULL is used for unsigned integer literals that are at least 64-bits wide.