The following code example is taken from the book
C++23 - The Complete Guide
by Nicolai M. Josuttis,
Leanpub, 2026
The code is licensed under a
Creative Commons Attribution 4.0 International License.
// raw code
#include <print>
#include <thread>
int main()
{
auto printThreadID = [] {
std::println("We are in thread {:15}", std::this_thread::get_id());
};
// print main thread ID:
printThreadID();
// starts threads that print their thread ID:
std::jthread t1{printThreadID};
std::jthread t2{printThreadID};
// wait for the end of the threads:
t1.join();
t2.join();
}