如何从cpp中的函数返回二维数组

int** create2DArray(int rows, int cols) {
    int** arr = new int*[rows];
    for (int i = 0; i < rows; i++) {
        arr[i] = new int[cols];
    }
    return arr;
}

void delete2DArray(int** arr, int rows) {
    for (int i = 0; i < rows; i++) {
        delete[] arr[i];
    }
    delete[] arr;
}

int main() {
    int rows = 3;
    int cols = 4;
    int** arr = create2DArray(rows, cols);

    // 使用二维数组

    delete2DArray(arr, rows);
    return 0;
}

std::vector<std::vector<int>> create2DArray(int rows, int cols) {
    std::vector<std::vector<int>> arr(rows, std::vector<int>(cols));
    return arr;
}

int main() {
    int rows = 3;
    int cols = 4;
    std::vector<std::vector<int>> arr = create2DArray(rows, cols);

    // 使用二维数组

    return 0;
}

struct Array2D {
    int** arr;
    int rows;
    int cols;
};

Array2D create2DArray(int rows, int cols) {
    Array2D arr2D;
    arr2D.rows = rows;
    arr2D.cols = cols;
    arr2D.arr = new int*[rows];
    for (int i = 0; i < rows; i++) {
        arr2D.arr[i] = new int[cols];
    }
    return arr2D;
}

void delete2DArray(Array2D arr2D) {
    for (int i = 0; i < arr2D.rows; i++) {
        delete[] arr2D.arr[i];
    }
    delete[] arr2D.arr;
}

int main() {
    int rows = 3;
    int cols = 4;
    Array2D arr2D = create2DArray(rows, cols);

    // 使用二维数组

    delete2DArray(arr2D);
    return 0;
}