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Text File  |  1991-05-29  |  220 b   |  22 lines
  1.  
  2.  
  3. Listing 6
  4.  
  5. #ifdef DEBUG
  6.     #define trace(p) fprintf(stderr, #p "\n")
  7. #else
  8.     #define trace(p) ((void)0)
  9. #endif
  10.  
  11. ...
  12.  
  13. int find(const char *s)
  14.     {
  15.     trace(entering find);
  16.  
  17.     ...
  18.  
  19.     trace(leaving find);
  20.     }
  21.  
  22.