What are set operations in C++11?

Can you explain what set operations are in C++11?

Sure! Set operations in C++11 allow you to perform mathematical set operations like union, intersection, and difference on sets.

How do I perform a union operation on two sets?

You can use the std::set_union function from the <algorithm> header. It combines two sets into a third set.

Can you show me a code example for that?

Of course! Here's a simple example:

#include <iostream>
#include <set>
#include <algorithm>

int main() {
    std::set<int> set1 = {1, 2, 3};
    std::set<int> set2 = {3, 4, 5};
    std::set<int> result;

    std::set_union(set1.begin(), set1.end(), set2.begin(), set2.end(), std::inserter(result, result.begin()));

    for (int num : result) {
        std::cout << num << " ";
    }
    return 0;
}

What will be the output of this code?

The output will be: 1 2 3 4 5, which represents the union of the two sets.