↩ revert:

C16-并发/parallel/signal/5sec_sig.c

@@ -17,7 +17,7 @@ static void alrm_handler(int sig)
  * @param    argv
  * @return   int
  ***********************************************************************/
-int main(int argc, char** argv)
+int main(int argc, char **argv)
 {
     long long count = 0;