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    Vorlage:cpp/io/basic ios/iostate accessors

    Aus cppreference.com
    ios_base::iostate flags basic_ios accessors
    eofbit failbit badbit good() fail() bad() eof() operator bool() operator!()
    false false false true false false false true false
    false false true false true true false false true
    false true false false true false false false true
    false true true false true true false false true
    true false false false false false true true false
    true false true false true true true false true
    true true false false true false true false true
    true true true false true true true false true