// const means “don’t change this”
// constexpr means “known at compile time”
//
// constexpr is a horrible name.  Too bad.
//
// If you’re a fan of C’s #define, use constexpr instead.

#include <iostream>
#include <cstdlib>

using namespace std;

int main() {
    const int alpha = rand();
    constexpr int beta = rand();	// Nope--not a compile-time expression
    constexpr int gamma = 42;

    return alpha+gamma;
}