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C++ Quiz #154

What a Return Code Cannot Carry

hardExceptions

divideCode signals an error by returning -1; divideThrow throws instead. What does the output show that a return code loses and an exception keeps?

📄 Code

1#include <iostream>
2#include <stdexcept>
3 
4int divideCode(int a, int b) {
5    if (b == 0) {
6        return -1;
7    }
8    return a / b;
9}
10 
11int divideThrow(int a, int b) {
12    if (b == 0) {
13        throw std::invalid_argument("division by zero");
14    }
15    return a / b;
16}
17 
18int main() {
19    int code = divideCode(10, 0);
20    std::cout << "code result: " << code << "\n";
21    int alsoCode = divideCode(-5, 5);
22    std::cout << "code result: " << alsoCode << "\n";
23    try {
24        int value = divideThrow(10, 0);
25        std::cout << "throw result: " << value << "\n";
26    } catch (const std::exception& e) {
27        std::cout << "throw result: " << e.what() << "\n";
28    }
29    return 0;
30}