Why not working??

Question

I saw it many times but I don’t know why it doesn’t work. Somebody HEEELP.

https://code.sololearn.com/cYca9JXaoJe4/?ref=app

Thank you very much.

Answer 1

C isn't defined so what are you trying to do ?

Answer 2

NoobAtNothing😈
ooooh thank you so much.
I will put this into my mind.