A RetroSearch Logo

Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Search Query:

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

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

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::time_t to_time_t( const time_point& t ) noexcept; (since C++11)

Converts t to a std::time_t type.

If std::time_t has lower precision, it is implementation-defined whether the value is rounded or truncated.

Contents

[edit] Parameters t - system clock time point to convert [edit] Return value

A std::time_t value representing t.

[edit] Example

Get the current time as a std::time_t two ways.

Run this code

#include <chrono>
#include <ctime>
#include <iostream>
#include <thread>
using namespace std::chrono_literals;
 
int main()
{
    // The old way
    std::time_t oldt = std::time({});
 
    std::this_thread::sleep_for(2700ms);
 
    // The new way
    auto const now = std::chrono::system_clock::now();
    std::time_t newt = std::chrono::system_clock::to_time_t(now);
 
    std::cout << "newt - oldt == " << newt - oldt << " s\n";
}

Possible output:

newt - oldt == 3 s
[edit] See also from_time_t

[static]

converts std::time_t to a system clock time point
(public static member function) [edit]

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4