The Catch-All Comes Last

1#include <iostream>
2#include <stdexcept>
3#include <string>
4 
5void attempt(int which) {
6    if (which == 1) {
7        throw std::runtime_error("disk full");
8    }
9    if (which == 2) {
10        throw 404;
11    }
12    if (which == 3) {
13        throw std::string("lost connection");
14    }
15    std::cout << "attempt " << which << " worked\n";
16}
17 
18int main() {
19    for (int which = 0; which <= 3; which++) {
20        try {
21            attempt(which);
22        } catch (const std::exception& e) {
23            std::cout << "standard: " << e.what() << "\n";
24        } catch (...) {
25            std::cout << "unknown problem\n";
26        }
27    }
28    return 0;
29}