问在c++11中进行相对日间比较的最干净的方法

EN

auto timePoint = std::chrono::system_clock::now();
std::time_t t = std::chrono::system_clock::to_time_t(timePoint);
auto ltime = std::localtime(&t); // or gmtime.
auto eventTime = std::chrono::hours(ltime->tm_hour)
    + std::chrono::minutes(ltime->tm_min);

auto lower_bound = std::chrono::hours(12) + std::chrono::minutes(0);
auto upper_bound = std::chrono::hours(12) + std::chrono::minutes(5);

if (lower_bound <= eventTime && eventTime <= upper_bound) {
    // Do some action.
}

#include <chrono>
#include <ctime>    // struct tm, gmtime()

using std::chrono::system_clock;

std::time_t ts = system_clock::to_time_t (system_clock::now());
std::tm& time = *gmtime (&ts);  // or localtime()

if (time.tm_hour==12 and time.tm_min>=0 and time.tm_min<5)
    cout << "Inside interval\n";