example1_basic_usage.cpp

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#include <iostream>
#include <unordered_set>

int main() {
    std::unordered_set<int> mySet = {1, 2, 3, 4, 5};

    // Insertion
    mySet.insert(6);
    mySet.insert(3);  // Duplicate element, will not be inserted

    // Lookup
    if (mySet.find(3) != mySet.end()) {
        std::cout << "3 is in the set." << std::endl;
    }

    // Deletion
    mySet.erase(2);

    // Iterating over the set
    std::cout << "Elements in mySet: ";
    for (int elem : mySet) {
        std::cout << elem << " ";
    }
    std::cout << std::endl;

    return 0;
}