C++

Topic: I/o operations

Why do we need to close a file.Eg.ifstream ifile;ifile.open("temp.dat").....ifile.close();What happens if we do not close() a file?

Normally file is close automatically if an application terminates normally, however if the application terminates abruptly like with a call to abort() or when application crashes, the file is not closed properly. Consequences are:<br>1. Data might be lost which was still in buffer and not flushed to file.<br>2. In worst case, the file my be destroyed.<br>3. intermittent problems in the program.<br>4. there is a system limit on how many files can be open at any one point, so not closing the file stream may increase this number (not 100% sure here). and you know the impact then.

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