std::chrono::duration<Rep,Period>::count

(C++11)

(C++20)

(C++11)

system_clock (C++11)
steady_clock (C++11)
high_resolution_clock (C++11)

is_clock (C++20)
utc_clock (C++20)
tai_clock (C++20)

gps_clock (C++20)
file_clock (C++20)
local_t (C++20)

is_amis_pm

(C++20)(C++20)

make12make24

(C++20)(C++20)

hh_mm_ss (C++20)

day (C++20)
month (C++20)
year (C++20)
weekday (C++20)
operator/ (C++20)
year_month_day (C++20)

year_month_day_last (C++20)
year_month_weekday (C++20)
year_month_weekday_last (C++20)
weekday_indexed (C++20)
weekday_last (C++20)
month_day (C++20)

month_day_last (C++20)
month_weekday (C++20)
month_weekday_last (C++20)
year_month (C++20)
last_speclast (C++20)(C++20)

tzdb (C++20)
tzdb_list (C++20)
get_tzdbget_tzdb_listreload_tzdbremote_version (C++20)(C++20)(C++20)(C++20)
sys_info (C++20)

local_info (C++20)
nonexistent_local_time (C++20)
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locate_zone (C++20)
current_zone (C++20)
time_zone (C++20)
choose (C++20)

zoned_traits (C++20)
zoned_time (C++20)
time_zone_link (C++20)
leap_second (C++20)
leap_second_info (C++20)
get_leap_second_info (C++20)

/ chrono

parse

(C++20)

C

[edit]

`constexpr rep count() const;`

.

()

.

#include <chrono>
#include <iostream>
int main()
{
    std::chrono::milliseconds ms{3}; // 3 
    // 6000 ,   3 
    std::chrono::microseconds us = 2*ms;
    //  30     
    std::chrono::duration<double, std::ratio<1, 30>> hz30(3.5);

    std::cout <<  " 3 ms  " << ms.count() << " \n"
              <<  "6000 us   " << us.count() << " \n"
              <<  "3.5 30    " << hz30.count() << " \n";       
}

:

 3 ms  3 
6000 us   6000 
3.5 30    3.5

duration_cast

(C++11)

duration duration
( ) []

cppreference.com

std::chrono::duration<Rep,Period>::count