What is the actual error message?
How did you declare choice?
What is ext() ?
This isn't a game of 20 questions to try and get you to show a decent amount of information that would enable us to help you.
Short, Self Contained, Correct Example
What is the actual error message?
How did you declare choice?
What is ext() ?
This isn't a game of 20 questions to try and get you to show a decent amount of information that would enable us to help you.
Short, Self Contained, Correct Example
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
