应该是在std::chrono_literals里面定义了下面两个函数：constexprstd::chrono::hoursoperator""h(unsigned...
今天发现使用using namespace chrono; using namespace std;是有先后顺序的。顺序不对编译器会报错 #include <iostream> #include <chrono> using namespace chrono; using namespace std; int main() { milliseconds ms(1000); // 编译错误:不明确的符号 cout << ms.count() << " milliseconds" << endl...
#include <chrono> #include <thread> using namespace gr::uhd; using gr::uhd::usrp_block; using gr::uhd::usrp_block_impl; using namespace std::chrono_literals; namespace { 0 comments on commit c6e9d6b Please sign in to comment. Footer...
libcron::Cron cron; cron.add_schedule("Hello from Cron", "* * * * * ?", [=](auto& i) { using namespace std::chrono_literals; if (i.get_delay() >= 1s) { std::cout << "The Task was executed too late..." << std::endl; } }); ...
#include <iostream> #include <chrono> using namespace std::chrono; using namespace std; using ull = unsigned long long; ull oddsum = 0; ull evensum = 0; void findeven(ull start, ull end) { for (ull i = start; i <= end; ++i) { if ((i & 1) == ...
EN本文基本上涵盖了c++11的所有新特性，并有详细代码介绍其用法，对关键知识点做了深入分析，对重要的...
().x, bottom, 0 }); using timeSpan = std::chrono::duration<int, std::ratio<1, 1>>; std::chrono::seconds duration(2); std::chrono::seconds delay(3); animation.Duration(timeSpan(duration)); animation.DelayTime(timeSpan(delay)); element.StartAnimation(L"Offset", animation); visuals...
The C++11 standard has introduced a new type of namespace called inline namespaces that are basically a mechanism that makes declarations from a nested namespace look and act like they were part of the surrounding namespace. Inline namespaces are declared using the inline keyword in the name...
#include <bits/stdc++.h>using namespace std;mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());int random(int st, int dr){uniform_int_distribution<mt19937::result_type> gen(st, dr);return gen(rng);}vector<int> lg;...
chrono_literals; class FrameListener : public rclcpp::Node { public: FrameListener() : Node("tf_frame_listener_cpp") { // Declare and acquire `target_frame` parameter target_frame_ = this->declare_parameter<std::string>("target_frame", "map"); tf_buffer_ = std::make_unique<tf2_ros:...