Why does the  operator in vector behave as it does?
Wed Apr 30 16:24:00 GMT 2008
Your "A" class is violating the requirements of what can be used with a
std::vector, since it is not really assignable. The compiler is generating
an implicit synthetic assignment operator, which does not do the necessary
memory management for your non-trivial class's id data member.
Add this routine:
A& operator = (A const& rhs)
int* temp = new int(rhs.GetValue());
And this, to avoid the *(rhs.id) syntax, make the code self-documenting, and
test for the NULL id case:
int GetValue() const
assert(id != NULL);
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