Print实现在pushback (vector)之后立即失败

#include <iostream>
#include <vector>

void print(const std::vector<int>& vec) {
    for (const auto& num : vec) {
        std::cout << num << " ";
    }
    std::cout << std::endl;
}

void push_back_with_failure(std::vector<int>& vec, int num) {
    try {
        vec.push_back(num);
        throw std::runtime_error("Push back failed");
    } catch (const std::exception& e) {
        std::cout << "Exception caught: " << e.what() << std::endl;
    }
}

int main() {
    std::vector<int> numbers;
    push_back_with_failure(numbers, 1);
    print(numbers);
    
    return 0;
}