My code has an error and I have no clue why. It works just fine and runs perfectly, but the error will not go away.

Question

https://code.sololearn.com/cuemkBbnItYm/?ref=app

Answer 1

You have one more
It has to be r = rand() % 3 + 1
and add srand(time(0)) as well

Answer 2

In the scan function if num is not equal to 1 2 or 3 you dont return a value