Abnormal behaviour

Question

Please look at the code where it prints "is not a prime number" (you must input non-prime number), it should print "Hello world" but does not. WHY?
https://code.sololearn.com/cDjDHpzN7PjP/?ref=app

Answer 1

i just put a
<<endl
before the semicolon of the statment and it got printed ...
i don't even know cpp that much ... 😅
hope that helps, happy coding!!

Answer 2

For some reason, the cout stream doesn't seem to be flushed, so you can either use << endl (as Anton Böhler pointed out) or << flush. Btw, the code says that 11 is not a prime number

Answer 3

Sorry for the expression, but it is retarded. The compiler should be consistent and I believe that it should work without endl anyway. Thanks guys.

Answer 4

Either way, what's wrong with that while loop (h<=n)