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Showing content from https://en.cppreference.com/w/cpp/language/../algorithm/../../cpp/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

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clock_time_conversion

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clock_cast

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Duration duration

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Clocks system_clock

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steady_clock

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is_clock

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operator/

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chrono I/O parse

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Time zone tzdb

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get_tzdbget_tzdb_listreload_tzdbremote_version

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sys_info

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ambiguous_local_time

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locate_zone

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current_zone

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time_zone

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choose

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zoned_traits

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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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