How do I use multimap in C++?

How do I use multimap in C++?

A multimap in C++ is a type of associative container that allows multiple values to be associated with a single key. You can include the header <map> and use it like this: std::multimap<KeyType, ValueType> myMap;.

Can you give me an example of inserting elements into a multimap?

Sure! You can insert elements using the insert method. For example: myMap.insert(std::make_pair(key, value)); You can insert multiple values for the same key.

How do I iterate through a multimap?

You can iterate through a multimap using a range-based for loop or an iterator. For example:

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

What are the advantages of using multimap over map?

The main advantage of using a multimap is that it allows duplicate keys, which is useful when you need to store multiple values for the same key. A regular map would overwrite the existing value.