/in/foo.cc: In function 'int mark(int, int*)':
/in/foo.cc:58:16: warning: 'result' may be used uninitialized [-Wmaybe-uninitialized]
   58 |         return result;
      |                ^~~~~~
/in/foo.cc:20:13: note: 'result' was declared here
   20 |         int result;//输出结果
      |             ^~~~~~