本题要求给定二叉树的高度。
函数接口定义:
int GetHeight( BinTree BT );
其中BinTree
结构定义如下:
typedef struct TNode *Position;
typedef Position BinTree;
struct TNode{
ElementType Data;
BinTree Left;
BinTree Right;
};
要求函数返回给定二叉树BT的高度值。
裁判测试程序样例:
#include <stdio.h>
#include <stdlib.h>
typedef char ElementType;
typedef struct TNode *Position;
typedef Position BinTree;
struct TNode{
ElementType Data;
BinTree Left;
BinTree Right;
};
BinTree CreatBinTree(); /* 实现细节忽略 */
int GetHeight( BinTree BT );
int main()
{
BinTree BT = CreatBinTree();
printf("%d\n", GetHeight(BT));
return 0;
}
/* 你的代码将被嵌在这里 */
输出样例(对于图中给出的树):
4
代码如下:
int GetHeight( BinTree BT )
{
if(BT == NULL) //树为空,深度为0
return 0;
if(BT->Left == NULL && BT->Right == NULL) //根节点下的左右节点均为空,度为1
return 1;
if(BT->Left == NULL) //左树为空,递归右树
return 1 + GetHeight(BT->Right);
if(BT->Right == NULL) //右树为空,递归左树
return 1 + GetHeight(BT->Left);
//通过递归,返回树的深度
return GetHeight(BT->Left)>GetHeight(BT->Right)?1+GetHeight(BT->Left):1+GetHeight(BT->Right);
}