private IBNode Delete(int value, IBNode tree)
{
if (tree == null)
{
}
else if (tree.IsLeaf())
{
tree = DeleteLeaf(value, tree);
}
else//递归去找叶子节点
{
var node = (BNode)tree;
bool finded = false;
for (int i = 0; i < node.Keys.Count; i++)
{
if (value < node.Keys[i])
{
tree = Delete(value, node.Children[i]);
}
}
if (!finded)
{
tree = Delete(value, node.Children[node.Keys.Count]);
}
}
return(tree);
}
/// <summary>
/// 这是最简单的插入，没有节省空间，
/// 如果一个节点的孩子数是2，除非关键字在这个节点的范围内，否则基本不会在往这里插入节点
/// </summary>
/// <param name="value"></param>
/// <param name="tree"></param>
/// <returns></returns>
private IBNode Insert(int value, IBNode tree)
{
//说明空
if (tree == null)
{
BLeaf leaf = new BLeaf(M);
leaf.AddValue(value);
tree = leaf;
}
else if (tree.IsLeaf())
{
tree = InsertLeaf(value, tree);
}
else//递归去找叶子节点
{
var node = (BNode)tree;
bool finded = false;
for (int i = 0; i < node.Keys.Count; i++)
{
if (value < node.Keys[i])
{
tree = Insert(value, node.Children[i]);
}
}
if (!finded)
{
tree = Insert(value, node.Children[node.Keys.Count]);
}
}
return(tree);
}
