online compiler and debugger for c/c++

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#include <iostream> #include <fstream> #include <thread> #include <atomic> #include <chrono> constexpr const char* filepath="./1.txt"; int main() { using namespace std::chrono_literals; //очистка файла { std::ofstream file(filepath); } //поток, пишущий в файл числа std::atomic<bool> stop{}; std::thread trd([&stop] { int n{1}; while(!stop) { std::this_thread::sleep_for(500ms); std::ofstream file(filepath,std::ios::app); if(file.is_open()) { file<<n++<<'\n'; file.flush(); } } }); //поток, останавливающий процесс записи через 10 секунд std::thread stop_trd([&stop] { std::this_thread::sleep_for(10s); stop=true; }); std::ifstream::pos_type last_pos{}; while(!stop) { std::this_thread::sleep_for(1000ms); std::ifstream file(filepath); if(!file.is_open())continue; file.seekg(last_pos,std::ios_base::beg); if(!file)continue; std::cout<<" opened to read\n"; bool some_read{}; int n{}; while(file>>n) { some_read=true; std::cout<<n<<','; last_pos=file.tellg(); } if(some_read)std::cout<<"\n"; } stop_trd.join(); trd.join(); std::cout<<"done!\n"; return 0; }
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