Closing I / O Streams

Question

What are the bad things that can happen when I don't close the stream?

Does the close operation work automatically?

Are all threads closed after the program exits?

Thanks in advance.

Answer 1

Bad things that can happen when you do not close your threads:

• you may run out of file descriptors
• data that you think is written to disk can still be in the buffer (only)
• files may be locked for other processes (platform dependent)
• ...

Yes, the close operation always clears the stream.

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Answer 2

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Answer 3

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