chrono库,灵活汇集了一些以各种精度跟踪时间的类型(如std::chrono::time_point)。 C 风格日期和时间工具(如std::time)。 std::chrono库 chrono库定义三种(C++20 前)五种(C++20 起)主要类型以及工具函数和常用 typedef。 时钟(clock), 时间点(time point), ...
ceil(std::chrono::time_point) (C++17) 转换time_point 到另一个,向上取整 (函数模板) round(std::chrono::time_point) (C++17) 转换time_point 到另一个,就近取整,偶数优先 (函数模板) 辅助类 std::common_type<std::chrono::time_point>
t-atime_pointto convert from Example Run this code #include <chrono>#include <iostream>usingClock=std::chrono::steady_clock;usingTimePoint=std::chrono::time_point<Clock>;voidprint_ms(constTimePoint&point){usingMs=std::chrono::milliseconds;constClock::durationsince_epoch=point.time_since_epoch(...
Date and time library Localization library Input/output library Algorithms library Numerics library Common mathematical functions Floating-point environment(C99) Pseudo-random number generation Complex number arithmetic(C99) Type-generic math(C99) Bit manipulation(C23) ...
std::chrono::time_point Member functions time_point::time_point time_point::time_since_epoch time_point::operator+=time_point::operator-= time_point::operator++time_point::operator-- (C++20)(C++20) time_point::min time_point::max Non-member functions operator+operator- operator==operator!
std::chrono::time_point::time_point (1) time_point(); (since C++11) (until C++14) constexprtime_point(); (since C++14) (2) explicittime_point(constduration&d); (since C++11) (until C++14) constexprexplicittime_point(constduration&d); ...
里面写得非常清楚：std::localtime 返回的是一个静态的内部 std::tm 对象指针，并不存在什么内存泄漏...
里面写得非常清楚：std::localtime 返回的是一个静态的内部 std::tm对象指针，并不存在什么内存泄漏的...
The storage of the vector is handled automatically, being expanded as needed. Vectors usually occupy more space than static arrays, because more memory is allocated to handle future growth. This way a vector does not need to reallocate each time an element is inserted, but only when the additi...
Date and time utilities Strings library NULL-terminated byte strings NULL-terminated multibyte strings NULL-terminated wide strings Algorithms Numerics Mathematical functions Floating-point environment(C99) Random number generation Complex number arithmetic(C99) ...