example3_callback_with_lambda_expression.cpp

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#include <iostream>
#include <functional>

// A function that takes a std::function callback
void process(int x, std::function<void(int)> callback) {
    std::cout << "Processing value: " << x << std::endl;
    callback(x);  // Invoke the callback function
}

int main() {
    int multiplier = 2;

    // Use a lambda expression as a callback
    process(10, [multiplier](int result) {
        std::cout << "Lambda callback: " << result * multiplier << std::endl;
    });

    return 0;
}