#include <atomic>#include <chrono>#include <iomanip>#include <iostream>#include <mutex>#include <random>#include <string>#include <thread> std::atomic<int> atomic_count{0}; std::mutex cout_mutex;int completed_writes{0}; constexprint global_max_count{72};constexprint writes_per_line{8};constexprint max_delay{100}; template<int Max>int random_value(){staticstd::uniform_int_distribution<int> distr{1, Max};staticstd::random_device engine;staticstd::mt19937 noise{engine()};staticstd::mutex rand_mutex;std::lock_guard lock{rand_mutex};return distr(noise);} int main(){auto work=[](conststd::string id){for(int count{};(count=++atomic_count)<= global_max_count;){std::this_thread::sleep_for(std::chrono::milliseconds(random_value<max_delay>())); // print thread `id` and `count` value{std::lock_guard lock{cout_mutex}; constbool new_line=++completed_writes% writes_per_line==0; std::cout<< id<<std::setw(3)<< count<<"  "<<(new_line?"\n":"")<<std::flush;}}}; std::jthread j1(work,"░"), j2(work,"▒"), j3(work,"▓"), j4(work,"█");}

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