// https://godbolt.org/z/qrs63vdz1
#include <chrono>
#include <iostream>
int main() {
using namespace std::chrono; // Allow suffixes
seconds mySecs = 121s; // seconds{121}
std::cout << mySecs.count() << "s\n"; // Output: 121s
milliseconds myMillis = mySecs; // automatically converted
std::cout << myMillis.count() << "ms\n"; // Output: 121000ms
nanoseconds myNanos = mySecs;
std::cout << myNanos.count() << "ns\n"; // Output: 121000000000ns
minutes myMinutesErr = mySecs; // (ERR) Error: Conversion with loss
minutes myMinutes = duration_cast<minutes>(mySecs); // explicit works
std::cout<<myMinutes.count()<<"min\n"; // Output: 2min
}