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std::chrono::system_clock::to_time_t(3) | C++ Standard Libary | std::chrono::system_clock::to_time_t(3) |
NAME¶
std::chrono::system_clock::to_time_t - std::chrono::system_clock::to_time_t
Synopsis¶
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.
Parameters¶
t - system clock time point to convert
Return value¶
A std::time_t value representing t.
Example¶
Get the current time as a std::time_t two ways.
// Run this code
#include <iostream>
#include <ctime>
#include <chrono>
#include <thread>
using namespace std::chrono_literals;
int main()
{
// The old way
std::time_t oldt = std::time(nullptr);
std::this_thread::sleep_for(2700ms);
// The new way
std::time_t newt = std::chrono::system_clock::to_time_t(
std::chrono::system_clock::now());
std::cout << "oldt-newt == " << oldt-newt <<
" s\n";
}
Possible output:¶
oldt-newt == -3 s
See also¶
from_time_t converts std::time_t to a system clock time point
[static] (public static member function)
2022.07.31 | http://cppreference.com |