bool MATRIX_Init(MATRIX *ob, size_t m, size_t n)
{
	size_t i, j;
	ob->m = m;
	ob->n = n;
	ob->arr = (double **)malloc(m*sizeof(double *));
	if(!ob->arr)
		return 0;
	for(i=0; i<m; ++i)
	{
		ob->arr[i] = (double *)malloc(n*sizeof(double));
		if(!ob->arr[i])
		{
			for(j=0; i<i; ++j)
			{
				free(ob->arr[j]);
				ob->arr[j] = NULL;
			}
			free(ob->arr);
			ob->arr = NULL;
			return 0;
		}
	}

	for(i=0; i<m; ++i)
	{
		for(j=0; j<n; ++j)
		{
			ob->arr[i][j] = sqrt((i+1.0)*(j+1.0));
		}
	}
	return 1;
}


void MATRIX_Free(MATRIX * ob)
{
	size_t i;
	if(ob->arr)
	{
		for(i=0; i<ob->m; ++i)
		{
			free(ob->arr[i]);
			ob->arr[i] = NULL;
		}
		free(ob->arr);
		ob->arr = NULL;
	}
}

void MATRIX_MultToVect(MATRIX * ob, double * vect, double *res)
{
	size_t i, j;
	double register dot;
	for(i=0; i<ob->m; ++i)
	{
		dot = 0;
		for(j=0; j<ob->n; ++j)
		{
			dot += ob->arr[i][j]*vect[j];
		}
		res[i] = dot;
	}
}0000000000000000000000000000000
void crash(char *str);
void check(MATRIX *ob, double *res);


int _tmain(int argc, _TCHAR* argv[])
{
	MATRIX matr;
	double *vect = NULL, *res = NULL;
	size_t m, n, i;

	printf("podaj m, n\n");
	scanf_s("%lu %lu", &m, &n);

	if(!MATRIX_Init(&matr, m, n))
		crash("init matr error");

	//prepare vect
	vect = (double *)malloc(n*sizeof(double));
	if(!vect)
	{
		MATRIX_Free(&matr);
		crash("vector allocation error");
	}

	res = (double *)malloc(m*sizeof(double));
	if(!res)
	{
		free(vect);
		MATRIX_Free(&matr);
		crash("vector allocation error");
	}

	for(i=0; i<n; ++i)
		vect[i] = 1.0;

	MATRIX_MultToVect(&matr, vect, res);

	check(&matr, res);

	if(vect)
		free(vect);
	vect = NULL;

	if(res)
		free(res);
	res = NULL;

	MATRIX_Free(&matr);

	system("pause");
	return 0;
}

void crash(char *str)
{
	printf("%s\n", str);
	system("pause");
	exit(1);
}

void check(MATRIX *ob, double *res)
{
	size_t i, j;
	double sum;
	const double eps = 1e-10;

	for(i=0; i<ob->m; ++i)
	{
		sum = 0;
		for(j=0; j<ob->n; j++)
		{
			sum += ob->arr[i][j];
		}
		if(fabs(sum-res[i]) > eps)
		{
			printf("error!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n");
			return;
		}
	}
}