从函数返回类对象时出现运行时错误

Question

我正在编写一个程序，它在构造函数中创建2D动态数组并在析构函数中删除它。但是当我从任何函数返回此类的对象时，它会导致运行时错误。

错误：访问冲突读取位置0xDDDDDD1

#include <iostream>
#include <cstdlib>
using namespace std;

class Matrix {
private:
    int **MyArray;
    int row, col;
public:
    Matrix(int r, int c) {
        MyArray = new int*[r];
        for (int i = 0; i < r; i++) {
            MyArray[i] = new int[c];
        }

        row = r;
        col = c;
    }

    Matrix test() {
        Matrix Temp(row, col);
        return Temp;
    }

    ~Matrix() {
        for (int i = 0; i < row; i++) {
            delete[] MyArray[i];
        }
        delete[] MyArray;
    }

};


int main() {
    Matrix m(2, 2), m2(2, 2);
    m.test();

    system("pause");
}

在追踪错误时，我在删除Temp对象后遇到了错误。该程序还删除了另一个位置。

#include <iostream>

using namespace std;

class Matrix {
private:
    int **MyArray;
    int row, col;
    static int count;
public:
    Matrix(int r, int c) {
        MyArray = new int*[r];
        for (int i = 0; i < r; i++)
            MyArray[i] = new int[c];

        row = r;
        col = c;
    }

    Matrix test() {
        Matrix Temp(row, col);
        cout << "Temp->" << &Temp << endl;
        return Temp;
    }

    ~Matrix()
    {
        cout << "deleting-> " << this << endl;
        for (int l = 0; l < row; l++)
            delete[] MyArray[l];
        delete[] MyArray;
    }
};

void main() {
    Matrix m(2, 2), m2(2, 2);
    cout << "m->" << &m << endl;
    cout << "m2->" << &m2 << endl;
    m.test();
}