What is std::set in C++17?

Can you explain what std::set is in C++17?

Sure! std::set is a container that stores unique elements following a specific order. It automatically sorts the elements.

How does std::set ensure that all elements are unique?

std::set uses a comparison function to check for uniqueness. If you try to insert a duplicate, it won't be added.

What are some common use cases for std::set?

Common use cases include storing unique items, implementing mathematical sets, and maintaining a sorted collection of elements.

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

Certainly! Here's a simple example:

#include <set>
#include <iostream>

int main() {
    std::set<int> mySet;
    mySet.insert(3);
    mySet.insert(1);
    mySet.insert(2);
    for (int x : mySet) {
        std::cout << x << " ";
    }
    return 0;
}

This will output: 1 2 3.