数据结构（中）树

时间：2019-07-20 10:05:16 阅读：98 评论：0 收藏：0 [点我收藏+]

标签：height eof tor || stack size style class info

一、二叉树

存储：

1.线性存储

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2.链式存储

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遍历：

1.先序遍历

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2.中序遍历

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3.后序遍历

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4.先序遍历堆栈（转自https://blog.csdn.net/weixin_37983220/article/details/84109033 ）

void PreOrderTraversal(BinTree BT)
{
BinTree T = BT;
Stack S = (Stack)malloc(sizeof(SNode));
S->Top = -1;
while (T || !IsEmpty(S))
{
while (T)    //一直向左，并将沿途节点压入堆栈
{
Push(S, T);
printf("%C", T->Data);
T = T->Left;
}
if (!IsEmpty(S))
{
T = Pop(S);
T = T->Right;
}
}
free(S);
}

5.中序遍历堆栈

void InOrderTraversal(BinTree BT)
{
BinTree T = BT;
Stack S = (Stack)malloc(sizeof(SNode));
S->Top = -1;
while (T || !IsEmpty(S))
{
while (T)    //一直向左，并将沿途节点压入堆栈
{
Push(S, T);
T = T->Left;
}
if (!IsEmpty(S))
{
T = Pop(S);
printf("%C", T->Data);
T = T->Right; 
}
}
free(S);
}

6.后序遍历堆栈

void PostOrderTraversal(BinTree BT)
{
BinTree T = BT;
Stack S = (Stack)malloc(sizeof(SNode));

Stack OutPut = (Stack)malloc(sizeof(SNode));
S->Top = -1;
OutPut->Top = -1;
while (T || !IsEmpty(S))
{
while (T)    //一直向左，并将沿途节点压入堆栈
{
Push(S, T);
Push(OutPut, T);
T = T->Right;
}
if (!IsEmpty(S))
{
T = Pop(S);
T = T->Left;
}
}
while (OutPut->Top != -1)
{
printf("%c", Pop(OutPut)->Data);
}
free(S);
free(OutPut);
}