How do I use iterators with std::map in C++11?

How do I use iterators with std::map in C++11?

In C++11, you can use iterators to traverse a std::map. Here's a simple example:

#include <iostream>
#include <map>

int main() {
    std::map<int, std::string> myMap = {{1, "One"}, {2, "Two"}, {3, "Three"}};
    for (auto it = myMap.begin(); it != myMap.end(); ++it) {
        std::cout << it->first << " : " << it->second << std::endl;
    }
    return 0;
}

What are the advantages of using iterators with std::map?

Using iterators with std::map allows you to traverse the elements in a way that is independent of the underlying data structure. This means you can easily access keys and values without worrying about the implementation details.

Can I use range-based for loops with std::map?

Yes, in C++11 and later, you can use range-based for loops with std::map. Here's an example:

for (const auto& pair : myMap) {
    std::cout << pair.first << " : " << pair.second << std::endl;
}

What if I want to modify the values while iterating?

If you want to modify the values while iterating, you can use a non-const reference in the range-based for loop:

for (auto& pair : myMap) {
    pair.second += " modified";
}