在模板的二进制树 [英] Binary-Tree in Template
问题描述
所以我想创建一个代码,它创建一个二叉树,它保存数据,例如ints像1,6,2,10,8和在pop我得到最大的数字,然后它被删除树,并且在推我可以插入一个新的元素。这应该是在一个模板,所以我可以很容易地改变我想要在树中持有的数据类型。现在我得到了树,到目前为止,没有模板它是工作好的思想,我可以添加项目,我可以打印它们,但是当我尝试把它放在一个模板,我得到以下错误: use of class模板需要模板参数列表。可能是什么问题?也许我做的完全错了。欢迎任何建议。
so i want to make a code, that creates a binary tree, that holds data, for example ints like 1,6,2,10,8 and on pop i get the biggest number, and after that it gets deleted from the tree, and on push i can insert a new element. And this should be in a template so i can easy change the data type i want to hold in the tree. Now i got the tree so far, without template it is working fine thought, i can add items, and i can print them, but when i try to put it in a template, i get the following error: use of class template requires template argument list . What could be the problem? Maybe i am doing it totally wrong. Any suggestions are welcome.
我得到以下代码:
#include <iostream>
using namespace std;
template<class T>
class BinaryTree
{
struct Node
{
T data;
Node* lChildptr;
Node* rChildptr;
Node(T dataNew)
{
data = dataNew;
lChildptr = NULL;
rChildptr = NULL;
}
};
private:
Node* root;
void Insert(T newData, Node* &theRoot)
{
if(theRoot == NULL)
{
theRoot = new Node(newData);
return;
}
if(newData < theRoot->data)
Insert(newData, theRoot->lChildptr);
else
Insert(newData, theRoot->rChildptr);;
}
void PrintTree(Node* theRoot)
{
if(theRoot != NULL)
{
PrintTree(theRoot->lChildptr);
cout<< theRoot->data<<" ";;
PrintTree(theRoot->rChildptr);
}
}
public:
BinaryTree()
{
root = NULL;
}
void AddItem(T newData)
{
Insert(newData, root);
}
void PrintTree()
{
PrintTree(root);
}
};
int main()
{
BinaryTree<int> *myBT = new BinaryTree();
myBT->AddItem(1);
myBT->AddItem(7);
myBT->AddItem(1);
myBT->AddItem(10);
myBT->AddItem(4);
myBT->PrintTree();
}
推荐答案
>
In the expression
new BinaryTree()
$ b b
标识符 BinaryTree
是一个模板,而不是类。您可能意味着
the identifier BinaryTree
is a template, not a class. You probably meant
new BinaryTree<int>()
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