#include <iostream>
#include <vector>
#include <stdexcept>
int main() {
try {
std::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)
}
// An exception handler, catches std::out_of_range, which is thrown by vec.at(4)
catch (std::out_of_range &e) {
std::cerr << "Accessing a non-existent element: " << e.what() << '\n';
}
// To catch any other standard library exceptions (they derive from std::exception)
catch (std::exception &e) {
std::cerr << "Exception thrown: " << e.what() << '\n';
}
// Catch any unrecognised exceptions (i.e. those which don't derive from std::exception)
catch (...) {
std::cerr << "Some fatal error\n";
}
}
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