/in/foo.cc: In function 'int main()':
/in/foo.cc:25:22: warning: 'zhen' may be used uninitialized [-Wmaybe-uninitialized]
   25 |         for(int i=0;i<=zhen;i++)
      |                     ~^~~~~~
/in/foo.cc:17:13: note: 'zhen' was declared here
   17 |         int zhen;
      |             ^~~~
/in/foo.cc:15:13: warning: 'dot' may be used uninitialized [-Wmaybe-uninitialized]
   15 |         int dot;
      |             ^~~