A Function That Reports Instead of Crashing

1#include <iostream>
2#include <stdexcept>
3#include <string>
4 
5int parsePercent(const std::string& text) {
6    int value = std::stoi(text);
7    if (value < 0 || value > 100) {
8        throw std::out_of_range("percent must be 0 to 100");
9    }
10    return value;
11}
12 
13std::string report(const std::string& text) {
14    try {
15        int value = parsePercent(text);
16        return "ok " + std::to_string(value);
17    } catch (const std::out_of_range& e) {
18        return std::string("range: ") + e.what();
19    } catch (const std::invalid_argument&) {
20        return "not a number";
21    }
22}
23 
24int main() {
25    std::string inputs[] = {"50", "150", "abc", "0"};
26    for (const std::string& text : inputs) {
27        std::cout << report(text) << "\n";
28    }
29    return 0;
30}