std::chrono::system_clock::to_time_t
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std::chrono::system_clock
Member functions
system_clock::to_time_t
Time point I/O
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