#include <boost/asio.hpp> #include <iostream> using namespace std::chrono_literals; namespace asio = boost::asio; constexpr auto wait_for = 200ms, run_for = 300ms; asio::awaitable<void> co_main(asio::io_context& other_ctx){ asio::steady_timer timer{other_ctx.get_executor(), wait...
#include<iostream> #include<chrono> #include<thread> #include <future> #include<vector> // 模拟从网站下载数据的函数 std::string download_data(int id) { std::this_thread::sleep_for(std::chrono::seconds(1)); // 模拟耗时操作 return "Data from website " + std::to_string(id); } //...
1有如下程序:#include <iostream>#include <iomanip>using namespace std;int main(){cout.fill('*');cout<<left<<setw(4)<<123<< "OK"<<end1;return 0;}执行这个程序的输出结果是( )。 A.123*OKB.123*OK**C.*123OKD.*123**OK 2有如下程序:#include <iostream>#include <iomanip>using name...
【简答题】有如下程序: #include<iostream> using namespace std; class A public: A()cout<<"A"; ～A()cout<<"A"; ; class B Aa; public: B()cout<<"B"; ～B()cout<<"B"; ; int main() B b; return 0: 程序的输出结果是___。 查看完整题目与答案 【简答题】分析以下程序执行结果【...
1有如下程序: #include<iostream> using namespace std; int main() cout.fill(’*’); cout.width (6); cout.fill(’#’); cout<<123<<end1; return 0;执行后的输出结果是___ 。 A.###123B.123###C.***123D.123*** 2有如下程序: #include <iostream> using namespace std; int main(...
#include<concepts>#include<coroutine>#include<exception>#include<iostream>struct ReturnObject{struct promise_type{ReturnObjectget_return_object(){return{};}std::suspend_neverinitial_suspend(){return{};}std::suspend_neverfinal_suspend()noexcept{return{};}voidunhandled_exception(){}};};struct Awaiter...
有如下程序:#include <iostream>using namespace std;class Base { public: void fun() {cout<<"Base:: fun"<<end1; }};class Derived: public Base ( public: void fun() { ___ cout<<"Derived:: fun"<<end1; }};int main() { Derived d; D. fun(); return O;}已知其执行后的输出结果...
有如下程序:#include<iostream>__using namespace std;__int main(){__ __int x={2,4,6,8,10,12}, s=0;__ __for(int i=1; i<6; i+=2) s+=x[i];__ __cout<
include <string> include <vector> include <iostream> include <objbase.h> // Needed for CComObjectRootEx<>::FindClass() and CComPtr<>. Also needed for CComQIPtr<> and CComBSTR(). See the remarks section of this header file for more information on why these headers are necessary. The import ...
是的，它是安全的。std::jthread的构造函数是synchronization。