c++ - Appending to existing file via boost -

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I need to collect several log files in a log.

I tried to promote it with: FileSystem :: Copy_file but it does not support the applying.

Any thoughts? (I'm liking it via libraries promoting)

Tnx

Don does not require a boost for this simple task - standard iostream will do the job: 

  #include

(Note that the above approach can have sub-optical performance, to see how to improve performance.)


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