https://www.learncpp.com/cpp-tutorial/bit-manipulation-with-bitwise-operators-and-bit-masks/
bit manipulation에 심화내용으로 생략한다
청룡동거주민
https://www.learncpp.com/cpp-tutorial/bit-manipulation-with-bitwise-operators-and-bit-masks/
bit manipulation에 심화내용으로 생략한다