example2_assert_in_a_class.cpp

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#include <cassert>
#include <iostream>
#include <vector>

class SafeArray {
private:
    std::vector<int> data;

public:
    void push_back(int value) {
        data.push_back(value);
    }

    int& at(size_t index) {
        assert(index < data.size() && "Index out of bounds");
        return data[index];
    }
};

int main() {
    SafeArray arr;
    arr.push_back(10);
    arr.push_back(20);

    std::cout << "Element at index 1: " << arr.at(1) << std::endl;
    std::cout << "Element at index 2: " << arr.at(2) << std::endl;

    return 0;
}