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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.
Why dont just use '+', '-', ...
They are the same as the numerical values, the other is more confusing and is only for ASCII
There is no ISO C 2020 standard. There is no reason to assume this valid syntax will be invalidated in the future.
No
check your output in tests
printf("%s\n", buffer);most likely a problem at the end of the line
'\0'check this out, it helped me: C online tutorial
You need to return a dynamically allocated string.
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