[英]insert values into a binary search tree in C?
I have a .h file that contains my struct and I must NOT edit this file: 我有一个包含我的struct的.h文件,我不能编辑这个文件:
struct KnightTree
{
int key;
int level;
int balance; //will be used in AVL only, and be ignored in other cases.
KnightTree* pLeftChild;
KnightTree* pRightChild;
};
And a .cpp file that I write my code here, I've written a code to insert 2 values (key and level) into the BST: 我在这里编写代码的.cpp文件,我编写了一个代码,将2个值(键和级别)插入到BST中:
void BSTinsert(KnightTree* tree, int k, int lvl)
{
KnightTree* newnode;
if (tree == NULL)
{
newnode->key=k;
newnode->level=lvl;
newnode->pLeftChild=NULL;
newnode->pRightChild=NULL;
tree = newnode;
}
else
{
if (tree->key > k)
BSTinsert(tree->pLeftChild,k,lvl);
else if (tree->key <= k)
BSTinsert(tree->pRightChild,k,lvl);
}
}
But when I run it, the console "thinks" itself for about 3 seconds and error pop-up said "exe has stop working" so I have to close the program . 但是当我运行它时,控制台“认为”自己大约3秒钟并且错误弹出窗口说“exe已经停止工作”所以我必须关闭程序 。 I think's simple but I'm kinda confused now... I'm using Visual C++ 6.0 (I have to use this old version...)
我觉得很简单,但我现在有点困惑......我正在使用Visual C ++ 6.0(我必须使用这个旧版本......)
Thank you guys! 感谢大伙们!
You have at least 2 major problems: 您至少有两个主要问题:
newnode
, so by addressing it you just create memory corruption. newnode
分配内存,因此通过解决它只会造成内存损坏。 tree = newnode
doesn't create the necessary link to the tree. tree = newnode
不会创建到树的必要链接。 Proceed from fixing these 2 issues. 从解决这两个问题开始。
And one more thing: have you tried to actually debug it before posting the question here? 还有一件事:你有没有试过在发布问题之前实际调试它?
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