Printing Invalid window ID

main.cpp

#include <SDL2/SDL.h>
#include <unistd.h>

int main(int argc, char const *argv[])
{
    uint32_t nix = 0;
    auto win = SDL_CreateWindow("Test", 0, 0, 400, 200, nix);

    SDL_RaiseWindow(win);

    printf("ID: %i\n", SDL_GetWindowID(win));

    while (1) { usleep(100000); }
    return 0;
}

Run with:

g++ -o test main.cpp -lSDL2 && ./test