//插入一个关系记录
public void insert(int countryid, int itemid, int score)
{
relation node = new relation();
node.countryid = countryid;
node.itemid = itemid;
node.score = score;
node.rank = 1;
if (head.next == null)
{
head.next = node;
}
else
{
relation current = head.next;
while (current != null)
{
if (current.itemid == node.itemid)
{
node.rank++;
if (node.score > current.score)
{
int tcid = current.countryid;
current.countryid = node.countryid;
node.countryid = tcid;
int ts = current.score;
current.score = node.score;
node.score = ts;
}
}
if (current.next == null)
{
current.next = node;
break;
}
current = current.next;
}
}
}
public relation head; //头结点
public RelationLink() //初始化头结点
{
head = new relation();
}