#define MAX_MATRIX2_DATA	10

typedef struct	{
					double	*a;
					int		i;
					int		j;
				} Matrix;

typedef struct	{
					double	*a[MAX_MATRIX2_DATA];
					int		i;
					int		j;
				} Matrix2;


extern	void ProdM( Matrix *M1, Matrix *M2 , Matrix *M);
extern	void ProdM2( Matrix *M1, Matrix2 *M2 , Matrix *M);
extern	void print_matrix( Matrix *M);
extern	void print_matrix2( Matrix2 *M);


#define el(ii,jj,m) (*( (m)->a + (jj)*((m)->i) + (ii) ))
#define el2(ii,jj,m) (*( (m)->a[jj] + (ii) ))

#define	new_matrix(x,y,m)  m.i=x; m.j=y;				\
	m.a = (double*)calloc((size_t)(m.i*m.j),sizeof(double))

#define	dispose_matrix(m) if(m.a!=NULL) free(m.a)