Difference in using read/write when stream is opened with/without ios::binary mode

Question

In my experiments with the following code snippet, I did not find any particular difference whether i created the streams with/without the ios:binary mode:

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Answer 1

When you want to write files in binary, with no modifications taking place to your data, specify the ios::binary flag. When you want to write files in text mode, don't specify ios::binary, and you may get things like line ending translation. If you're on a UNIX-like platform, binary and text formats are the same, so you won't see any difference.