[Test] Change struct value inside std::map

#include <iostream>
#include <map>
#include <functional>

struct teste {
    int n;
};

int main() {
    std::map<char, teste> m;
    teste tst;
    tst.n = 5;
    m.insert(std::make_pair('c', tst));

    std::map<char, teste>::iterator it1 = m.find('c');
    if (it1 != m.end()) {
        teste tst1 = it1->second;
        std::cout << tst1.n << std::endl;
    }

    std::map<char, teste>::iterator it2 = m.find('c');
    if (it2 != m.end()) {
        teste tst2 = it2->second;
        tst2.n = 42;
        it2->second = tst2;
    }

    std::map<char, teste>::iterator it3 = m.find('c');
    if (it3 != m.end()) {
        teste tst3 = it3->second;
        std::cout << tst3.n << std::endl;
    }

    system("pause");
    return 1;
}