标签:blog io ar os sp on 2014 log ef
/*
* 样例 DBA,,C,,E,GF,,,
*/
#include<cstdio>
#include<cstdlib>
#include<cmath>
#include<map>
#include<queue>
#include<stack>
#include<vector>
#include<algorithm>
#include<cstring>
#include<string>
#include<iostream>
#define ms(x,y) memset(x,y,sizeof(x))
const int MAXN=1000+10;
const int INF=1<<30;
using namespace std;
struct Node
{
char ch;
Node *left, *right;
};
void BuildTree(Node *&root)
{
Node *s = (Node *)malloc(sizeof(Node));
s->left = NULL;
s->right = NULL;
scanf("%c", &s->ch);
if(s->ch == ','){
free(s);
return;
}
root = s;
BuildTree(root->left);
BuildTree(root->right);
}
void PreOrder(Node *root)
{
if(root == NULL) return;
printf("%c", root->ch);
PreOrder(root->left);
PreOrder(root->right);
}
void InOrder(Node *root)
{
if(root == NULL) return;
InOrder(root->left);
printf("%c", root->ch);
InOrder(root->right);
}
void PostOrder(Node *root)
{
if(root == NULL) return;
PostOrder(root->left);
PostOrder(root->right);
printf("%c", root->ch);
}
int main()
{
freopen("in.txt","r",stdin);
Node *root;
BuildTree(root);
PreOrder(root);
printf("\n");
InOrder(root);
printf("\n");
PostOrder(root);
printf("\n");
return 0;
}
标签:blog io ar os sp on 2014 log ef
原文地址:http://blog.csdn.net/u013351484/article/details/41725495