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// future::get
#include <iostream> // std::cout, std::ios
#include <future> // std::async, std::future
#include <exception> // std::exception
int get_int() {
std::cin.exceptions (std::ios::failbit); // throw on failbit set
int x;
std::cin >> x; // sets failbit if invalid
return x;
}
int main ()
{
std::future<int> fut = std::async (get_int);
std::cout << "Please, enter an integer value: ";
try {
int x = fut.get();
std::cout << "You entered: " << x << '\n';
}
catch (std::exception&) {
std::cout << "[exception caught]";
}
return 0;
}
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