And as I suggested in the comment, std::chrono::duration<unsigned int> should be slightly more efficient and you shouldn't then need to worry about overflows as long as the original unsigned int doesn't overflow. Share Follow edited Feb 7, 2014 at 17:01 answered Feb 7, 2014 at 11...
如果你想要第二个午夜，这样就不会有昨天的比特数，那么把choose::earliest改为choose::latest。如果您...
8 typedef std::chrono::duration<int> seconds_type; 9 typedef std::chrono::duration<int,std::milli> milliseconds_type; 10 typedef std::chrono::duration<int,std::ratio<60*60>> hours_type; 11 12 hours_type h_oneday (24); // 24h 13 seconds_type s_oneday (60*60*24); // 86400s ...
#include <chrono> #include <thread> #include <iostream> int main() { std::chrono::duration<int> dur(2); std::cout << std::chrono::time_point_cast<std::chrono::seconds> (std::chrono::steady_clock::now()) .time_since_epoch().count() << std::endl; // 以秒为单位输出当前时间...
::chrono::system_clock::to_time_t(tp - std::chrono::seconds(1)); ss << std::put_time(std::localtime(&t), "%Y-%m-%d %T") << "." << std::setfill('0') << std::setw(3) << (std::chrono::duration_cast<std::chrono...
time_t time_tee = 253402210800; auto tp = std::chrono::system_clock::from_time_t(time_tee); time_t tee2 = std::chrono::system_clock::to_time_t(tp); std::cout << tee2 << std::endl; Expectation: Output of 2534022108 Output: -4852206231 time_t is 64bit, so there should not...
{ \using Period = std::chrono::##x::period; \std::cout << #x << ": " << Period::num << " " << Period::den << std::endl; \}intmain(intargc,char**argv){{Print(nanoseconds);Print(microseconds);Print(milliseconds);Print(seconds);Print(minutes);Print(hours);Print(days);...
string to_str_ex(const std::chrono::system_clock::time_point &time){ uint64_t mill = std::chrono::duration_cast<std::chrono::milliseconds>(time.time_since_epoch()).count() -std::chrono::duration_cast<std::chrono::seconds>(time.time_since_epoch()).count()*1000; char _time[25] ...
2 constexpr ToDuration duration_cast (const duration<Rep,Period>& dtn); 典型的用法是表示一段时间: 1 // duration constructor 2 #include <iostream> 3 #include <ratio> 4 #include <chrono> 5 6 int main () 7 { 8 typedef std::chrono::duration<int> seconds_type; ...
我需要将 std::chrono::time_point 转换为 long 类型(整数 64 位)。我开始使用 std::chrono… 这是我的代码: int main () { std::chrono::time_point<std::chrono::system_clock> now = std::chrono::system_clock::now(); auto epoch = now.time_since_epoch(); auto value = std::chrono::...