What is wrong with this code. Can anyone solve this code.

Question

https://code.sololearn.com/c7S4UNk2CNvV/?ref=app

Answer 1

1) \n should be inside double quotes
2) comment getch() it doesn't needed in sololearn compiler
3) void error just warning ignore it

Answer 2

About the warning:
Good Practice recommends main function to return an int. It's great for status codes - they inform the caller about errors.
For you to follow good practice from now on, just change main type to int, and return zero at its end.