foo.cc: In function ‘int main()’:
foo.cc:50:36: warning: ‘tot’ may be used uninitialized [-Wmaybe-uninitialized]
   50 |                                 tot++;//猴群数量增1
      |                                 ~~~^~
foo.cc:35:13: note: ‘tot’ was declared here
   35 |         int tot;
      |             ^~~