/in/foo.cc: In function 'int main()':
/in/foo.cc:7:17: warning: variable 'z' set but not used [-Wunused-but-set-variable]
    7 |         int x,y,z;
      |                 ^
/in/foo.cc:21:18: warning: 'y' may be used uninitialized [-Wmaybe-uninitialized]
   21 |         cout<<y<<" "<<x<<endl;
      |                  ^~~
/in/foo.cc:7:15: note: 'y' was declared here
    7 |         int x,y,z;
      |               ^
/in/foo.cc:21:23: warning: 'x' may be used uninitialized [-Wmaybe-uninitialized]
   21 |         cout<<y<<" "<<x<<endl;
      |                       ^
/in/foo.cc:7:13: note: 'x' was declared here
    7 |         int x,y,z;
      |             ^