博客

#include <stdio.h>
#include <stdlib.h>

typedef struct TNode
{
	char data;
	struct TNode* lchild;
	struct TNode* rchild;
}TNode;

TNode* creat()
{
	char x;
	TNode* pT;
	scanf("%c", &x);
	if (x == '#')
		pT = NULL;
	else
	{
		pT = (TNode*)malloc(sizeof(TNode));
		pT->data = x;
		pT->lchild = creat();
		pT->rchild = creat();
	}
	return pT;
}

void op(TNode* pT)
{
	if (pT != NULL)
	{
		op(pT->lchild);
		printf("%c", pT->data);
		op(pT->rchild);
	}
}

int main()
{
	TNode* pT;
	pT = creat();
	op(pT);
	return 0;
}