Question

I am trying to access a specific element out of a std::map with more than two elements. Here is an example:

std::map <int, CString, CString, CString> map;

//Initialise

map[0] = _T("stuff1"), _T("stuff2"), _T("stuff3");

//now if I just want to access stuff3 is it this:

CString str = map[0][2];

//or something more like this?

CString str = map[0]. ???

Any help would be great thanks.

edit: Thanks sorry about that, first time using maps, I was wondering why I couldn’t find any information on std::map ‘s with more elements inside.

Answer 1

Have you tried to compile this? It shouldn’t.
You can create only a map with exactly 1 key and 1 value for each element.

But the value can be compound, so you can write

struct ValueType {
 CString v1;
 CString v2;
 CString v3;
}
std::map <int, ValueType> map;

and access elements like map[somekey].v3;

To insert a value in such a map, you’ll have to write

ValueType strings = {"1","2","3"};
map.insert(999, strings);

Or you may create a helper function (i.e. void addToMap(std::map <int, ValueType> &map, CSting const& v1, CString const& v2, CString const& v3) ), which will fill your map in a more convenient way.