Enthuware

is wrong, for me to compile and run without any problems, the result is 10

As explained in the explanation, it is not possible to determine which thread will run first. So even if you get 10 every time you run it, you cannot rely on this fact that it will always print 10.

HTH,
Paul.

Hi Paul.

Could you explain what does it mean volatile modifier and how it influnce output.