lassie% /lib/cpp -P -C main3.c
/* File: main3.c

   This is a simple main program.
   It's main purpose is to include the header
   files new_header.h and new_header2.h to show how 
   #include and #ifndef work.
*/


/**** File: new_header.h 
   This is a simple header file.
*/



int sum(int, int) ;
int global_variable = 1 ;


/**** End of file: new_header.h */

/**** File: new_header2.h 
   
   This is another simple header file.
   It includes the file new_header.h
   It contains one function prototype.
*/





/**** File: new_header.h 
   This is a simple header file.
*/

/**** End of file: new_header.h */

int diff(int, int) ;


/**** End of file: new_header2.h */


main() {
  int n ;

  n = sum(3, 4) ;
  n = diff(5,7) ;
}
lassie%