void checksum(int m[], int pos, int *seven, int *sodd)
{
	if(pos>=MAX)
	{
		printf("sodd: %d, seven: %d.\n", *sodd, *seven);
		return;
	}
	if (pos==0)
	{
		*seven = m[pos];
		checksum(m, pos+1, seven, sodd);
		return;
	}
	if (pos==1)
	{
		*sodd = m[pos];
		checksum(m, pos+1, seven, sodd);
		return;
	}
	if (!(pos%2))
	{
		*seven = *seven + m[pos];
		checksum(m, pos+1, seven, sodd);

	}
	else
	{
		*sodd= *sodd + m[pos];
		checksum(m, pos+1, seven, sodd);
	}
	return;
}

int main(void)
{
    int mat[MAX]={0,1,2,3,4,5,6,7,8,9};
	int seven, sodd;

    checksum(mat, 0, &seven, &sodd);
}