二叉树的建立

1 typedef int ElemType;
2 
3 struct BinaryTreeNode
4 {
5     ElemType m_nValue;//结点值
6     BinaryTreeNode *m_pLeft;//左节点地址
7     BinaryTreeNode *m_pRight;//右节点地址
8 };

 1 BinaryTreeNode * CreateTree(BinaryTreeNode *bTree)
 2 {
 3     int input;
 4     scanf("%d",&input);            //按先序建立二叉树
 5     if(input == ‘#’)
 6     {
 7         bTree = NULL;    //置为NULL后结束
 8         return bTree;    
 9     }
10     bTree = (BinaryTreeNode *)malloc(sizeof(BinaryTreeNode));
11     bTree ->m_nValue = input;
12     bTree->m_pLeft = CreateTree(bTree->m_pLeft);
13     bTree->m_pRight = CreateTree(bTree->m_pRight);
14     return bTree;
15 }