insert map into map?

Im having problems inserting a map into a map, I cant manage to access the actual element and call insert() on it.

Thank you

Code:

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#include <map>
using namespace std;

int main() {
        map<int, multimap<int, int> > my_map;

        map<int, multimap<int, int> >::iterator my_it;
        pair<map<int, multimap<int, int> >::iterator, bool> func_pair;
 
        my_it = my_map.find(42);
        if(my_it == my_map.end()) {
                func_pair = my_map.insert(make_pair(42, multimap<int, int>()));
                (func_pair.first)->insert(make_pair(42, 42));
        } else {
                //
        }
       
        return 0;
}

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func_pair.first is an iterator into your map. Dereferencing that iterator will give you a pair of <int, multimap>. If you are intending to insert your (42, 42) pair into that multimap, you will have to access the second element of that pair, something like (untested):

Code:

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((func_pair.first)->second).insert(make_pair(42, 42));

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What problem are you trying to solve such that you've arrived at a map to a multimap as the best solution? That's awfully unusual.
Or is it just a learning exercise?