printf("int a (expected -1): %d\n", mybf.a);
printf("unsigned x:13 (expected 4097): %u\n", mybf.x);
printf("unsigned y:17 (expected 65537): %u\n", mybf.y);
printf("unsigned y:3 (expected 5): %u\n", mybf.z);
printf("int a (expected -1): %d\n", mybf.a);
printf("unsigned x:13 (expected 4097): %u\n", mybf.x);
printf("unsigned y:17 (expected 65537): %u\n", mybf.y);
printf("unsigned y:3 (expected 5): %u\n", mybf.z);