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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.
I don't know sorry I only use that on Unix system. =/ I didn't try to port this to non-Unix systems.
My version is okay (and runs).
endl is missing a reference to the namespace std.
Why is this not portable to non-Unix systems? For example, instead of your custom str, which uses Unix syscalls, try using the standard prinf.