foo.cc: In function 'int Hws(int)':
foo.cc:46:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
foo.cc:31:16: warning: 'n' is used uninitialized in this function [-Wuninitialized]
  for(int x=1; x<=n; x++) 
               ~^~~
foo.cc:45:14: warning: 'cnt' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<endl<<cnt<<endl;  
              ^~~