copy-constructor http://en.cppreference.com/w/cpp/language/copy_constructor copy-constructor copy-constructor copy-constructor Trivial Trivial http://en.cppreference.com/w/cpp/language/copy_constructor http://en.cppreference.com/w/cpp/language/copy_constructor Trivial 복사 생성자 copy-constructor copy-constructor Trivial copy-constructor http://en.cppreference.com/w/cpp/language/copy_constructor Trivial copy-constructor copy-constructor copy-constructor Trivial copy-constructor