中序遍歷的遞歸算法和非遞歸算法。
template <class T>
void recitraverse(struct node<T>* Tree)
{
    if(Tree == NULL) return;
    itraverse(Tree->left);
    visitnode(Tree);
    itraverse(Tree->right);
}
中序遍歷的非遞歸算法visit節點時與前序不同。
template <class T>
void itraverse(struct node<T>*tree)
{
    if(tree == NULL) return;
    MyStack<struct node<T> *> treestack;
    treestack.init(20);
    while(tree != NULL|| treestack.gettop()!=0)
    {
        if(tree!=NULL)
        {
            treestack.push(tree);
            tree = tree->left;
        }
        else
        {
            tree = treestack.pop();
            visitnode(tree);
            tree = tree->right;

        }
    }

}