Any Type Can Be Thrown

1#include <iostream>
2#include <string>
3 
4void signal(int level) {
5    if (level == 1) {
6        throw 42;
7    }
8    if (level == 2) {
9        throw std::string("red alert");
10    }
11    if (level == 3) {
12        throw 2.5;
13    }
14    std::cout << "level " << level << " is calm\n";
15}
16 
17int main() {
18    for (int level = 0; level <= 3; level++) {
19        try {
20            signal(level);
21        } catch (int code) {
22            std::cout << "int thrown: " << code << "\n";
23        } catch (const std::string& message) {
24            std::cout << "string thrown: " << message << "\n";
25        } catch (...) {
26            std::cout << "something else thrown\n";
27        }
28    }
29    return 0;
30}