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std::chrono example - getting unix timestamp
#include <chrono>
#include <ctime>
#include <iostream>
int main() {
// std::chrono only
auto now = std::chrono::system_clock::now();
std::cout << "std::chrono only: " << std::chrono::duration_cast<std::chrono::seconds>(now.time_since_epoch()).count() << std::endl;
std::cout << "with std::ctime: " << std::chrono::seconds(std::time(NULL)).count() << std::endl;
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