C++ HEADER GUARD
[C Header file](https://texonom.com/c-header-file-d66ee59613554a26a3b9518693813a9a) 


```type#ifndef FNAME_H#define FNAME_H```



> [C++ 01.12 - 헤더 가드 (header guard)](https://boycoding.tistory.com/146)





