/in/foo.cc: In function 'int main()':
/in/foo.cc:16:5: warning: 'zhen' may be used uninitialized in this function [-Wmaybe-uninitialized]
 int zhen;
     ^~~~
/in/foo.cc:14:5: warning: 'dot' may be used uninitialized in this function [-Wmaybe-uninitialized]
 int dot;
     ^~~