example2_lambda_expressions.cpp

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#include <iostream>
#include <thread>
#include <vector>

int main() {
    std::vector<std::thread> threads;

    for (int i = 0; i < 3; ++i) {
        threads.emplace_back([i]() {
            std::cout << "Thread " << i << " is running." << std::endl;
        });
    }

    for (auto& t : threads) {
        t.join();
    }

    std::cout << "All threads completed." << std::endl;
    return 0;
}