std::chrono::time_point<Clock,Duration>::time_since_epoch duration time_since_epoch()const; (since C++11) (constexpr since C++14) Returns adurationrepresenting the amount of time between*thisand theclock's epoch
Show the start of the epoch. Run this code #include <stdio.h>#include <time.h>#include <stdint.h>intmain(void){time_t epoch=0;printf("%jd seconds since the epoch began\n",(intmax_t)epoch);printf("%s",asctime(gmtime(&epoch)));} ...
time_since_epoch()) + i.second.offset << ' ' << i.second.abbrev << " which are both equivalent to\n" << i.first.end << " UTC"; 若i.result != std::chrono::local_info::nonexistent 则行为未定义。 2) 复制构造函数。若 *this 与other 均拥有动态类型 std::chrono::nonexistent_...
time_point( const time_point<Clock, Duration2>& t ); (C++11 起) (C++14 起为 constexpr) 从数个可选数据源之一构造新的 time_point。 1) 默认构造函数,创建表示 Clock 的纪元(即 time_since_epoch() 为零)的 time_point。2) 构造位于 Clock 的纪元加上 d 的time_point。3...
#include <chrono>#include <iostream>usingClock=std::chrono::high_resolution_clock;usingTimePoint=std::chrono::time_point<Clock>;voidprint_ms(constTimePoint&point){usingMs=std::chrono::milliseconds;constClock::durationsince_epoch=point.time_since_epoch();std::cout<<std::chrono::duration_cast<...
#include <stdint.h> #include <stdio.h> #include <time.h> int main(void) { time_t result = time(NULL); if (result != (time_t)(-1)) printf("The current time is %s(%jd seconds since the Epoch)\n", asctime(gmtime(&result)), (intmax_t)result); } Possible output: The curr...
difftime computes the difference between times (function) time returns the current calendar time of the system as time since epoch (function) clock returns raw processor clock time since the program is started (function) timespec_get (C11) ...
localtimelocaltime_rlocaltime_s (C23)(C11) converts time since epoch to calendar time expressed as local time (function) gmtimegmtime_rgmtime_s (C23)(C11) converts time since epoch to calendar time expressed as Coordinated Universal Time (UTC) (function) C++ documentation for tm ...
Defined in header<time.h> structtm*gmtime(consttime_t*timer); (1) structtm*gmtime_r(consttime_t*timer,structtm*buf); (2)(since C23) structtm*gmtime_s(consttime_t*restricttimer,structtm*restrictbuf); (3)(since C11) 1)Converts given time since epoch (atime_tvalue pointed to byti...
constexpr std::common_type_t<D1,D2> operator-( const time_point<C,D1>& pt_lhs, const time_point<C,D2>& pt_rhs ); (since C++14) Performs add and subtract operations involving a time_point. 1,2) Applies the offset d to pt. Effectively returns CT(pt.time_since_epoch() + d...