Using #define one time for multiple source files

Question

Is there a way in Visual C++ to #define something in a cpp file and have it defined in other cpp files as well?

Answer 1

There are at least two options:

• Put the definition into a header file and include that header file in all the source files in which you need the definition
• Use the /D compiler option to define the macro (this can also be set in the project properties under C/C++ -> Preprocessor -> Preprocessor Definitions)