Re: How to delete pointers held inside a vector

From:
David Wilkinson <no-reply@effisols.com>
Newsgroups:
microsoft.public.vc.language
Date:
Mon, 18 Jun 2007 17:55:44 -0500
Message-ID:
<OsCwfNfsHHA.1204@TK2MSFTNGP03.phx.gbl>
ColinG wrote:

After reading Tom's reply. I use:

in MC.h:

std::vector<tCDV> m_cDV;

in MC.ccp:

int num = file.read_int();
  for (j=0; j < num; j++) {
    cc = file.read_ushort(); // file.read_ushort() initialised elsewhere in
program
    cr = file.read_ushort(); // file.read_ushort() initialised elsewhere in
program
   p_cDV = new tCDV;
   p_cDV->intC = cc;
   p_cDV->lngR = cr;
   p_cDV->blnE = file.read_bool(); // file.read_bool() initialised elsewhere
in program
   p_cDV->strC = file.read_string(); // file.read_string() initialised
elsewhere in program
   m_cDV.push_back(p_cDV);
}

in destructor for MC class:

 for (int x = 0; x < m_cDV.size(); x++) {
  delete[] m_cDV[x];
 }

which results in the following error:

MC.cpp(59) : error C2440: 'delete' : cannot convert from 'struct MC::tCDV'
to ''
        No user-defined-conversion operator available that can perform this
conversion, or the operator cannot be called
MC.cpp(59) : fatal error C1903: unable to recover from previous error(s);
stopping compilation


Colin:

Before you had new and no delete. Now you have delete and no new. If you
put pointers in a container you must new and delete them. If you put
objects in a container you need neither.

--
David Wilkinson
Visual C++ MVP

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