In article <fvtks8$jte$1@[EMAIL PROTECTED]
>, brad@[EMAIL PROTECTED]
says...
> New to C++. Just ran into a need to store three things in a map. Before
> trying it, I thought I'd post here and ask for advice. Here is an
> example of what I need to store:
>
> map<string name, string prefix, int length>
>
> Both name and prefix would be unique for each map entry. I was wondering
> if the the first entry could be an array that holds the two items (name
> and prefix), but then I wondered how an iterator would behave when
> it->first is called.
It can't be an array -- it has to be copyable and assignable. It can be
a pair<string, string> though, in which case you'd do something like
it->first.first or it->first.second, to access the name and prefix
respectively.
Of course, you could also create a class of your own to hold the two
strings, something like:
class key {
string name;
string prefix;
public:
key(string n, string p) : name(n), prefix(p) {}
key(key const &other) : name(other.name), prefix(other.prefix) {}
key &operator=(key const &other) {
name = other.name;
prefix = other.prefix;
return *this;
}
bool operator<(key const &other) const {
if (name < other.name)
return true;
if (name > other.name)
return false;
if (prefix < other.prefix)
return true;
return false;
}
};
--
Later,
Jerry.
The universe is a figment of its own imagination.
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