c++ - Netbeans shows "unable to resolve identifier", but builds and runs code -


I am working on a C ++ project in Netbeen for a few weeks. A few days ago Netbeans started showing 

  unable to resolve the identifier

for each variable through the whole code. But the code still works It can be successfully created.

So there really is no problem with my code, but these red lines are very annoying.

Thank you for your help.


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