What are the iterators available for std::map in C++11?

Can you explain the different iterators available for std::map in C++11?

Sure! In C++11, std::map provides three types of iterators: iterator, const_iterator, and reverse_iterator.

What is the difference between iterator and const_iterator?

The 'iterator' allows modification of the elements, while 'const_iterator' provides read-only access to the elements.

How do I use reverse_iterator with std::map?

You can use reverse_iterator to iterate through the map in reverse order. For example:

std::map<int, std::string>::reverse_iterator rit;

This allows you to access elements from the end to the beginning.

Can you give me a code example using these iterators?

Certainly! Here's a simple example:

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;
}

for (auto rit = myMap.rbegin(); rit != myMap.rend(); ++rit) {
    std::cout << rit->first << ": " << rit->second << std::endl;
}