/in/foo.cc: In function 'int main()':
/in/foo.cc:6:8: warning: unused variable 'y' [-Wunused-variable]
  int x,y,sum=0;
        ^
/in/foo.cc:11:4: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   x=x/10;
   ~^~~~~