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本题要求按照先序遍历的顺序输出给定二叉树的叶结点。
void PreorderPrintLeaves( 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;
};
函数PreorderPrintLeaves
应按照先序遍历的顺序输出给定二叉树BT
的叶结点,格式为一个空格跟着一个字符。
#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 */
void PreorderPrintLeaves( BinTree BT );
int main()
{
BinTree BT = CreatBinTree();
printf("Leaf nodes are:");
PreorderPrintLeaves(BT);
printf("\n");
return 0;
}
/* 你的代码将被嵌在这里 */
Leaf nodes are: D E H I
void PreorderPrintLeaves( BinTree BT ){
if(BT!=NULL){
if(BT->Left==NULL&&BT->Right==NULL)printf(" %c",BT->Data);
PreorderPrintLeaves(BT->Left);
PreorderPrintLeaves(BT->Right);
}
}