How to Access Vectors from Multiple Threads Safely?

// C++ Program to illustrate how to access vectors from
// multiple threads safely
#include <iostream>
#include <mutex>
#include <thread>
#include <vector>

using namespace std;

vector<int> myVector;
// Mutex for safe access to the vector
mutex mtx;

// Function to add an element to the vector safely
void addToVector(int value)
{
    lock_guard<mutex> lock(mtx); // Acquire the mutex
    myVector.push_back(value); // Add element to the vector
}

int main()
{
    // Create two threads to concurrently add elements to
    // the vector
    thread t1(addToVector, 10);
    thread t2(addToVector, 20);

    t1.join();
    t2.join();

    // Display the elements of the vector
    cout << "Vector elements: ";
    for (int value : myVector) {
        cout << value << " ";
    }
    cout << endl;

    return 0;
}