/in/foo.cc: In function 'int main()':
/in/foo.cc:11:8: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  if(x=0)
        ^
/in/foo.cc:19:9: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<y;
         ^