/in/foo.cc: In function 'int main()':
/in/foo.cc:34:6: warning: 'posl' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int posl,posr;
      ^~~~
/in/foo.cc:34:11: warning: 'posr' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int posl,posr;
           ^~~~