Thread: File IO Error Question

  1. #1
    Supermassive black hole cboard_member's Avatar
    Join Date
    Jul 2005

    File IO Error Question

    Just a niggling question:

    FILE* f = NULL; 
    if ((f = fopen("C:\\test.dat", "w")) == NULL)
    	std::cerr << "Error writing file" << std::endl;
    // write or whatever
    fclose (f);
    If an error occurs, will the file handle be closed?
    Good class architecture is not like a Swiss Army Knife; it should be more like a well balanced throwing knife.

    - Mike McShaffry

  2. #2
    ATH0 quzah's Avatar
    Join Date
    Oct 2001
    If fopen fails, then nothing was opened. Therefore, there's nothing to close. If something else generates an error, it would have to depend on the error I suppose. Usually, no. If you get a read error because you're trying to read past the EOF, no, it doesn't just close the file automatically.

    Hope is the first step on the road to disappointment.

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