Question

I want to include a global .h file into my .cpp, but it is in C-style.

In it, global variables are defined like:

 int a;    
 int b; 

Which causes error.

How can I change it to be compatible with my .cpp file?

Answer 1

• Remove the definition from the header file.
• Declare them as extern in the header file & define the variables in (exactly)one cpp file.
• Include the header file in whichever cpp file which wants to access the variables.

If you define a variable in header file, you will end up violating the One definition rule and encounter linking errors.