/in/foo.cc: In function 'int main()':
/in/foo.cc:6:15: warning: 'x' is used uninitialized [-Wuninitialized]
    6 |         int x,xx=x;
      |               ^~
/in/foo.cc:6:13: note: 'x' declared here
    6 |         int x,xx=x;
      |             ^