Question

I'm getting this error message but don't understand what it means.

Answer 1

@wio

Answer 2

I dunno, I don't even know what is in the code

Answer 3

This is my code, looks long, but the actual functions are really small except for insert.

Answer 4

Such exception arises when your code doesn't have an entry point or a main function.....Does your code have a "main()" function? The code you showed doesn't have it. Also can you tell what commands are you using for compilation?

Answer 5

I don't see a main function lol :p