Code not working

Question

Why doesn't Copied code work ?

https://sololearn.com/compiler-playground/WayHVe6h2Z0C/?ref=app

Answer 1

how are we supposed to know without seeing the code?

show the code.

describe WHAT is not working.

Answer 2

Provide the code here so that I can help you

Answer 3

if assume you copied a working code, for example from GitHub, and try to compile it on your PC, isn't guarantee that it will compile without errors.
This has to do with some factors such as language version, missing libraries, OS SDK version or other compiler settings