what wrong here

Question

https://code.sololearn.com/c0Jx2Offmy1U/?ref=app

Answer 1

Not sure if the math is right, but you get output now

https://code.sololearn.com/ctRlDTGys8hu/?ref=app

Answer 2

Look at scanf and
you need spaces in the func declarations between type and paramater name

Answer 3

hey can u please explain me the working

Answer 4

This is recursive function . Function calling again and again