Throw and Catch a Runtime Error

1#include <iostream>
2#include <stdexcept>
3 
4int main() {
5    try {
6        std::cout << "opening the vault\n";
7        throw std::runtime_error("wrong code");
8    } catch (const std::exception& e) {
9        std::cout << "caught: " << e.what() << "\n";
10    }
11    std::cout << "done\n";
12    return 0;
13}