why am i getting Eof error: eof when reading a line ?

Question

trying to build the simple calculator, looks like ive got the input wrong. Can anyone help make this code work ?
https://code.sololearn.com/c0SnbT1eAqPH/?ref=app
https://code.sololearn.com/c0SnbT1eAqPH/?ref=app

Answer 1

Taking the input from user is in while loop and the SL editor don't pop up input again.
so second time we are not able to give input resulting in eof error