x.man49期朴明秀表演那个是不是香港的电影英雄本色的歌啊？

det(matrix);
//matrix.h
//*******************************
# ifndef matrix_h
# define matrix_h

class matrix
{
private:
int m;
int n;
double arr[8][8];
public:
matrix();
matrix(double);
void set();// 对矩阵的赋值;
void show();//在屏幕上显示矩阵;
friend int homotype(matrix,matrix);//是否同型;
friend int multipliable(matrix,matrix);
//判断矩阵是否可相乘
friend matrix operator +(matrix,matrix);
//矩阵相加,对加号重载;
friend matrix operator -(matrix,matrix);
//矩阵机减,对减号重载;
friend matrix add(matrix,matrix);
//矩阵相加;
friend matrix minus(matrix,matrix);
//矩阵相减
friend matrix multiply(matrix,matrix);
//矩阵相乘
friend matrix operator *(matrix,matrix);
//矩阵相乘,对乘号重载;
friend double det(matrix);
//求方阵的行列式;
int issquare()
{
return m==n;
}
//判断是否为方阵;
matrix left(int x,int y);
//求元素arr[x][y](x,y从0开始)的余子式;