How does the std::map work in C++17?

How does the std::map work in C++17?

In C++17, std::map is an associative container that stores elements in key-value pairs, where keys are unique.

What are the main features of std::map?

Some main features include automatic sorting of keys, logarithmic time complexity for insertions, deletions, and lookups.

Can you show me a simple example of using std::map?

Sure! Here's a basic example:

#include <iostream>
#include <map>

int main() {
    std::map<int, std::string> myMap;
    myMap[1] = "One";
    myMap[2] = "Two";

    for (const auto& pair : myMap) {
        std::cout << pair.first << " : " << pair.second << std::endl;
    }
    return 0;
}

What are the differences between std::map and std::unordered_map?

The main difference is that std::map is ordered and uses a balanced tree structure, while std::unordered_map is unordered and uses a hash table.