求解C++析构函数释放内存错误原因，头疼。

Question

拜托看一下我这个矩阵类实现里的析构函数哪里错了，编译没问题，运行出错。
删掉析构函数就可以运行了，为什么呢？

• #include
• using namespace std;
• class CMatrix
• {
• public:
• CMatrix(int, int); //构造函数
• void output(); //输出矩阵各元素
• CMatrix operator +(CMatrix &M2); //重载矩阵加运算
• CMatrix operator -(CMatrix &M2); //重载矩阵减运算
• friend istream & operator>>(istream &, CMatrix &);
• friend ostream & operator<<(ostream &, CMatrix &);
• ~CMatrix()
• {
• delete[] m_pData;
• }
• private:
• int m_row; //矩阵行数
• int m_col; //矩阵列数
• double *m_pData; //使用指针指向矩阵各元素
• };
• //构造函数
• CMatrix::CMatrix(int r, int c)
• {
• m_row = r;
• m_col = c;
• m_pData = new double[r*c];
• for (int i = 0; i<m_row*m_col; i++)
• m_pData[i] = 0;
• }
• //矩阵输出函数
• void CMatrix::output()
• {
• int j = 0;
• for (int i = 0; i<m_row*m_col; i++)
• {
• cout << m_pData[i] << " ";
• if ((i + 1) % m_col == 0)
• cout << endl;
• }
• }
• //重载矩阵相加运算
• CMatrix CMatrix::operator +(CMatrix &M2)
• {
• CMatrix M(m_row,m_col);
• for (int i = 0; i<m_row*m_col; i++)
• M.m_pData[i] = m_pData[i] + M2.m_pData[i];
• return M;
• }
• //重载矩阵相减运算
• CMatrix CMatrix::operator -(CMatrix &M2)
• {
• CMatrix M(this->m_row,this->m_col);
• for (int i = 0; i<m_row*m_col; i++)
• M.m_pData[i] = m_pData[i] - M2.m_pData[i];
• return M;
• }
• istream & operator>>(istream &input, CMatrix &c)
• {
• for (int i = 0; i < c.m_row*c.m_col; i++)
• input >> c.m_pData[i];
• return input;
• }
• ostream & operator<<(ostream &output, CMatrix &c)
• {
• for (int i = 0; i < c.m_row*c.m_col; i++)
• {
• output << c.m_pData[i];
• if ((i + 1) % c.m_col == 0)
• output << endl;
• }
• return output;
• }
• int main()
• {
• CMatrix M1(2, 2), M2(2, 2), M3(2, 2);
• cin >> M1;
• cout << M1;
• cin >> M2;
• cout << M2;
• M3 = M1 + M2;
• cout << M3;
• M3 = M1 - M2;
• cout << M3;
• return 0;
• }

Answer 1

http://bbs.csdn.net/topics/370209063