Error in count digit problem

Why my program facing error in this compiler while it is working fine in other compiler

program giving compilation error in ide.codingblocks.com??
this should not happen
check once again also send your code i will check

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.