Re: Compilation errors in a vector problem

From:
Victor Bazarov <v.Abazarov@comAcast.net>
Newsgroups:
comp.lang.c++
Date:
Wed, 02 Dec 2009 00:14:19 -0500
Message-ID:
<hf4t3g$ojs$1@news.datemas.de>
Ankur Arora wrote:

While coding an algorithm for the following problem, there are a few
compilation errors that I don't completely understand. The errors
are:-

error C2839: invalid return type 'Human **' for overloaded 'operator -

'


error C2039: 'PrintFamilyTree' : is not a member of
'std::_Vector_iterator<_Ty,_Alloc>'
1> with
1> [
1> _Ty=Human *,
1> _Alloc=std::allocator<Human *>
1> ]
[..]

void PrintFamilyTree(const short& generation)
{
  printf("Name : %s Generation = %d\n", m_Name.c_str(),generation);
  vector<Human*>::iterator it;
  for (it = this.begin(); it< this.end() ;it++)


What's "this" doing here? As I understand the language rules, the line
above should not compile. Or is that function inside a class
definition? Then it still not supposed to compile since 'this' is a
pointer and with a pointer '.' cannot be used (pointers don't have members).

Also, it is more idiomatic to use != when comparing an iterator to the
end of the container being iterated, not <.

  {
     it->PrintFamilyTree(generation+1);
  }
}

-----------------------------------------------------------------------------------------------------------
The problem occurs at the line:-
it->PrintFamilyTree(generation+1);


Are you sure?

V
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