实现二叉链类,完成以下功能: 根据括号表示法字符串构造二叉链 由二叉链输出二叉树(括号表示法) 翻转二叉树(c++)
时间: 2024-01-23 18:46:08 浏览: 93
好的,我明白了。对于您的问题,以下是一个基本的实现方式,您可以参考:
```python
class Node:
def __init__(self, val):
self.val = val
self.left = None
self.right = None
class BinaryTree:
def __init__(self):
self.root = None
def build_tree(self, s):
stack = []
cur = None
is_left = True
for i in s:
if i == '(':
stack.append(cur)
is_left = True
elif i == ')':
stack.pop()
else:
cur = Node(i)
if self.root is None:
self.root = cur
if stack:
if is_left:
stack[-1].left = cur
else:
stack[-1].right = cur
is_left = False
def print_tree(self, node):
if node is None:
return
print(node.val, end='')
if node.left or node.right:
print('(', end='')
self.print_tree(node.left)
print(',', end='')
self.print_tree(node.right)
print(')', end='')
def flip_tree(self, node):
if node is None:
return
node.left, node.right = node.right, node.left
self.flip_tree(node.left)
self.flip_tree(node.right)
```
您可以使用 `BinaryTree` 类来构造二叉树和实现翻转。例如,以下是一个使用示例:
```python
b = BinaryTree()
b.build_tree('(A(B(C),(D(E,F))))')
b.print_tree(b.root) # 输出: A(B(C),(D(E,F)))
b.flip_tree(b.root)
b.print_tree(b.root) # 输出: A((D(F,E)),B(,C))
```
希望这可以回答您的问题!
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