foo.cc: In member function ‘void PolyListNode::output()’:
foo.cc:73:9: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
   73 |         for(int i=0;i<n;i++)
      |         ^~~
foo.cc:75:11: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
   75 |           cout<<endl;
      |           ^~~~
foo.cc: In member function ‘PolyListNode PolyListNode::operator*(PolyListNode)’:
foo.cc:101:13: warning: unused variable ‘i’ [-Wunused-variable]
  101 |         int i=0,j=0;
      |             ^
foo.cc:101:17: warning: unused variable ‘j’ [-Wunused-variable]
  101 |         int i=0,j=0;
      |                 ^