int main(int argc, char* argv[]) { CClock clock; clock.Start(); // OnAlarm함수를 콜백함수로 설정 clock.SetCallbackFunction(OnAlarm); isSleeping = 1; printf("zzz...\n"); while (isSleeping) { Sleep(1000); } clock.Stop(); printf("go to work...\n"); Sleep(1000); return 0; }