How to use multimaps with container types

multimap_example.cpp

#include <iostream>
#include <map>

using namespace std;


typedef vector<int> counts;
void creation(multimap<string,counts>* contents) {
    *contents = { 
        {"a", {1,1,1}},
        {"the", {1,1,1}},
        {"please", {1,1,1}},
        {"people", {1,1,1}},
    };  
}

int main() {
    multimap<string,counts> contents;
    multimap<string,counts> emptiedmap;
    creation(&contents);
    auto f = contents.find("please");
    if (f != contents.end()) {
        f->second.push_back(30);
        cout << "The find 'please' returns ";
        for (auto i : f->second)
        cout << i << " "; 
    }   

    cout << endl;

    // meanwhile...
    f = emptiedmap.find("anything");
    if (f != emptiedmap.end()) {
        cout << "Actually found something in emptiedmap." << endl;
    } else {
        cout << "Was empty, but didn't throw error." << endl;
    }   

    /*  
    // This throws an error cuz you can't cout a container. 
    // However, `itr->first` holds the key, and `itr->second` holds the value.
    for (auto itr = contents.find("the"); itr != contents.end(); itr++) {
        cout << "Found element at " << itr->second << endl;
    }
    */

    return 0;
}