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:

#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;
}

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:

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

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?