C 語言最大難點揭秘[3]

        /*******
  * ...
  *
  * Note that the return value of get_message points to a
  * fixed memory location.  Do NOT free() it; remember to
  * make a copy if it must be retained ...
  *
  ********/
 char *get_message()
 {
     static char this_buffer[400];

            ...
     (void) sprintf(this_buffer, ...);
     return this_buffer;
        }

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