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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Yes! Same here. Did you find out if it was your code or something else?
User code was not the reason here: this was a warning that was not evident when the translation was made in an earlier version of C. I have now just averted this warning.
What function exactly is not declared? Some library function, or some function implemented by you? How is it declared? You declare it explicitly, or include some header file?