所以我正在做一个简单的二叉树来存储整数,但我不断收到一个“表达式必须有指针类类型”错误插入函数,这可能只是我没有注意到的东西很明显,但我相对较新的C++,所以任何帮助,将不胜感激。由于C++二叉树指针问题
struct node
{
//Data stored in this node of the tree
int data;
//The left branch of the tree
node *left;
//The right branch of the tree
node *right;
};
using namespace std;
//Inserts a value into the tree
void insert(node **tree, int value)
{
if (*tree == nullptr)
{
//Create new node
*tree = new node;
//Set new value
(*tree)->data = value;
//Set branches to nullptr
(*tree)->left = nullptr;
(*tree)->right = nullptr;
}
else
{
if (value < (*tree)->data)
insert(*tree->left, value);//ERROR HERE
if (value >(*tree)->data)
insert(*tree->right, value);//ERROR HERE
}
}
//Deletes the tree
void delete_tree(node *tree)
{
if (tree != NULL)
{
delete_tree(tree->left);
delete_tree(tree->right);
delete tree;
}
}
//Prints the tree in order
void inorder(node *tree)
{
if (tree != nullptr)
{
inorder(tree->left);
cout << tree->data << " ";
inorder(tree->right);
}
}
int main(int argc, char **argv)
{
while (true){
//if(userinputflag=0)
//else node *tree = input number
node *tree = nullptr;
while (true)
{
int num;
cout << "Enter number (-1 to exit): ";
cin >> num;
if (num == -1)
break;
insert(&tree, num);
}
inorder(tree);
cout << endl;
}
}
您是否尝试过'插入(&((* tree) - > left),value);'already? – 2015-04-03 19:01:20
您应该在这里发布之前删除不相关的代码*。 – 2015-04-03 19:01:29