#include <chrono>#include <iostream> int main(){std::chrono::milliseconds ms{3};// 3 milliseconds// 6000 microseconds constructed from 3 millisecondsstd::chrono::microseconds us=2* ms;// 30Hz clock using fractional ticksstd::chrono::duration<double,std::ratio<1,30>> hz30(3.5); std::cout<<"3 ms duration has "<< ms.count()<<" ticks\n"<<"6000 us duration has "<< us.count()<<" ticks\n"<<"3.5 30Hz duration has "<< hz30.count()<<" ticks\n";}

3 ms duration has 3 ticks6000 us duration has 6000 ticks3.5 30Hz duration has 3.5 ticks