如何使用智能指针为类创建指针矩阵？

#include <iostream>
#include <vector>
#include <memory>

class MyClass {
public:
    MyClass(int value) : m_value(value) {
        std::cout << "Constructing MyClass with value: " << m_value << std::endl;
    }

    ~MyClass() {
        std::cout << "Destructing MyClass with value: " << m_value << std::endl;
    }

    void printValue() {
        std::cout << "Value: " << m_value << std::endl;
    }

private:
    int m_value;
};

int main() {
    int rows = 3;
    int cols = 4;

    std::vector<std::vector<std::unique_ptr<MyClass>>> matrix;

    for (int i = 0; i < rows; i++) {
        std::vector<std::unique_ptr<MyClass>> row;
        for (int j = 0; j < cols; j++) {
            row.push_back(std::make_unique<MyClass>(i * cols + j));
        }
        matrix.push_back(std::move(row));
    }

    // Access and use the elements in the matrix
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            matrix[i][j]->printValue();
        }
    }

    return 0;
}