foo.cc: In function ‘int main()’:
foo.cc:11:15: warning: ‘s’ may be used uninitialized [-Wmaybe-uninitialized]
   11 |         cout<<s<<endl;
      |               ^
foo.cc:6:23: note: ‘s’ was declared here
    6 |         int xmin,xmax,s;
      |                       ^