C++ syntax: Difference between revisions

Revision as of 12:52, 25 April 2025

Revision as of 12:52, 25 April 2025

Line 482:

<syntaxhighlight lang="cpp" line="1">

import std;

using Exception = std::exception;

using OutOfRangeException = std::out_of_range;

using Vector = std::vector;

int main() {

try {

Vectorstd::vector<int> vec{3, 4, 3, 1};

int i{vec.at(4)}; // Throws an exception, std::out_of_range (indexing for vec is from 0-3 not 1-4)

} catch (const OutOfRangeExceptionstd::out_of_range& e) {

// An exception handler, catches std::out_of_range, which is thrown by vec.at(4)

std::println(stderr, "Accessing a non-existent element: {}", e.what());

} catch (const Exceptionstd::exception& e) {

// To catch any other standard library exceptions (they derive from std::exception)

std::println(stderr, "Exception thrown: {}", e.what());