*****Listing 2*****
     init.h
     #ifdef DEBUG
     #define INIT  = NULL
     #else
     #define INIT
     #endif

     any other file
     #include "stdio.h"
     #include "init.h"
             ...
     someproc(...)
        {
         char * a INIT;
         something * b INIT;
         ...
        }

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