foo.cc: In function ‘int main()’:
foo.cc:10:20: warning: ‘cnt’ may be used uninitialized [-Wmaybe-uninitialized]
   10 |                 cnt=cnt+(n%9==0&&n%8!=0);
      |                 ~~~^~~~~~~~~~~~~~~~~~~~~
foo.cc:5:15: note: ‘cnt’ was declared here
    5 |         int n,cnt;
      |               ^~~