c++跨平台高精度定时器

main.cpp

#include <iostream>
#include <chrono>

int main()
{
    auto start = std::chrono::high_resolution_clock::now ();
    /*
    do something...
    */
    auto end      = std::chrono::high_resolution_clock::now ();
    auto duration = std::chrono::duration_cast<std::chrono::microseconds> (end - start);
    printf ("总计耗时%f秒\n", (double(duration.count ()) * std::chrono::microseconds::period::num / std::chrono::microseconds::period::den));
    return 0;
}