/in/foo.cc: In function 'int main()':
/in/foo.cc:29:18: warning: 'n2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   cout<<n1<<" "<<n2<<endl;
                  ^
/in/foo.cc:29:9: warning: 'n1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   cout<<n1<<" "<<n2<<endl;
         ^