Pragma ( preprocessor directive) is not working

Answer 1

if its not working, maybe it because pragma were introduced on c++11 standard library. Make sure you use c++11 or later version to make it working. Other than that, maybe you can use ifndef... (it was same as pragma)

Example:
#ifndef CLASS_H
#define CLASS_H

//Some code

#endif

Answer 2

Where's your code ?

Answer 3

thank u Miya , yup maybe this is the reason