example4_use_with_caution.cpp

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#include <iostream>
#include <vector>
#include <algorithm>

int main() {
    using namespace std;

    vector<int> numbers = {5, 2, 8, 1, 9};
    sort(numbers.begin(), numbers.end());

    for (const auto& num : numbers) {
        cout << num << " ";
    }
    cout << endl;

    return 0;
}