basic_ifstream::is_open
Determines if a file is open.
bool is_open( ) const;
반환 값
true if the file is open, false otherwise.
설명
The member function returns rdbuf -> is_open.
예제
See basic_filebuf::is_open for an example that uses is_open.
요구 사항
Header: <fstream>
네임스페이스: std