Can anyone help me on how to change this programme function into different c++ programme which will get same output.

Question

https://code.sololearn.com/cKFIT3Mhli62/?ref=app

Answer 1

i need to change the function to different functions like (switch : case1 and etc) ... i did it for no 1&2 ... no 3 part (display result ) i don't know how to do it .. can you help me with it ?

Answer 2

and the programme keeps running for the output 36000 😭