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Showing content from https://en.cppreference.com/w/cpp/language/../algorithm/../chrono/system_clock/now.html below:

std::chrono::system_clock::now - cppreference.com

[edit template] C++ Compiler support Freestanding and hosted Language Standard library Standard library headers Named requirements Feature test macros (C++20) Language support library Concepts library (C++20) Diagnostics library Memory management library Metaprogramming library (C++11) General utilities library Containers library Iterators library Ranges library (C++20) Algorithms library Strings library Text processing library Numerics library Date and time library Input/output library Filesystem library (C++17) Concurrency support library (C++11) Execution control library (C++26) Technical specifications Symbols index External libraries [edit] Date and time library Time point time_point

(C++11)

clock_time_conversion

(C++20)  

clock_cast

(C++20)

Duration duration

(C++11)

Clocks system_clock

(C++11)

steady_clock

(C++11)

is_clock

(C++20)

utc_clock

(C++20)

tai_clock

(C++20)

high_resolution_clock

(C++11)

gps_clock

(C++20)

file_clock

(C++20)

local_t

(C++20)

Time of day is_amis_pm

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

make12make24

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

hh_mm_ss

(C++20)

Calendar 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)

chrono I/O parse

(C++20)


Time zone 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)

ambiguous_local_time

(C++20)

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)

C-style date and time [edit] std::chrono::system_clock Member functions

system_clock::now

system_clock::to_time_t system_clock::from_time_t Time point I/O operator<< formatter<std::chrono::sys_time> from_stream [edit] static std::chrono::time_point<std::chrono::system_clock> now() noexcept; (since C++11)

Returns a time point representing the current point in time.

[edit] Return value

A time point representing the current time.

[edit] Example

Run this code

#include <chrono>
#include <iostream>
 
int main()
{
    const auto now = std::chrono::system_clock::now();
    const std::time_t t_c = std::chrono::system_clock::to_time_t(now);
    std::cout << "The system clock is currently at " << std::ctime(&t_c);
}

Possible output:

The system clock is currently at Thu Mar 30 13:28:27 2023

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