質問編集履歴
4
ソースコード
test
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test
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@@ -26,7 +26,7 @@
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python 3.4.3
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-
```python
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```python
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# coding: utf-8
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3
ファイル名追加
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test
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@@ -26,7 +26,7 @@
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python 3.4.3
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```
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```python:tree_formula.py
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# coding: utf-8
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2
ソースコードの入力を改めました
test
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test
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@@ -26,74 +26,74 @@
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26
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python 3.4.3
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```
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# coding: utf-8
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# Here your code !
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class tnode :
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class tnode :
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-
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def __init__(self):
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+
self.left = None
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+
self.ope = ""
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-
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self.right = None
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-
def gentree(p, w):
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+
def gentree(p, w):
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p = tnode()
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-
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+
w_lst = list(w)
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53
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-
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+
p.ope = w_lst.pop()
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-
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if p.ope == "-" or p.ope == "+" or p.ope == "*" or p.ope == "/" :
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-
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w = "".join(w_lst)
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-
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+
p.right = gentree(p.right, w)
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61
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-
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+
p.left = gentree(p.left, w)
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-
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return p
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+
def prefix(p):
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-
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+
if p :
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-
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+
yield p.ope
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71
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-
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+
yield from prefix(p.left)
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-
------yield from prefix(p.left)
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74
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-
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-
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+
yield from prefix(p.right)
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# main
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81
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-
f = input()
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f = input()
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print(f)
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-
root = None
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+
root = None
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root = gentree(root, f)
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-
for x in prefix(root):
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for x in prefix(root):
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95
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-
print(x, end="")
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97
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print(x, end="")
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96
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-
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97
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-
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98
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```
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1
ソースコードのインデント追加
test
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@@ -1 +1 @@
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1
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-
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1
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+
逆ポーランド記法の式から、式の木（２分木）を作るプログラム（再帰）
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test
CHANGED
|
@@ -32,67 +32,67 @@
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32
32
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33
33
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34
34
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35
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-
class tnode :
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35
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+
class tnode :
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36
36
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37
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-
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37
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+
---def init(self):
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38
38
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39
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-
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39
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+
---self.left = None
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40
40
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41
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-
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41
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+
---self.ope = ""
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42
42
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43
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-
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43
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+
---self.right = None
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44
44
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45
45
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46
46
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47
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-
def gentree(p, w):
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47
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+
def gentree(p, w):
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48
48
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49
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-
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49
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+
---p = tnode()
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50
50
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51
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-
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51
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+
---w_lst = list(w)
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52
52
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53
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-
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53
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+
---p.ope = w_lst.pop()
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54
54
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55
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-
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55
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+
---if p.ope == "-" or p.ope == "+" or p.ope == "*" or p.ope == "/" :
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56
56
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57
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-
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+
------w = "".join(w_lst)
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58
58
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59
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-
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59
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+
------p.right = gentree(p.right, w)
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60
60
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61
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-
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61
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+
------p.left = gentree(p.left, w)
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62
62
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63
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-
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63
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+
---return p
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64
64
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65
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-
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66
65
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67
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-
def prefix(p):
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68
66
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69
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-
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67
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+
def prefix(p):
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70
68
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71
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-
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69
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+
---if p :
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72
70
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73
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-
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71
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+
------yield p.ope
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74
72
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73
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+
------yield from prefix(p.left)
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74
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+
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75
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-
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75
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+
------yield from prefix(p.right)
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76
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77
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78
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79
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|
# main
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80
80
|
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81
|
-
f = input()
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81
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+
f = input()
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82
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83
83
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print(f)
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84
84
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85
85
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86
86
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87
|
-
root = None
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87
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+
root = None
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88
88
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89
89
|
root = gentree(root, f)
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90
90
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91
91
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92
92
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93
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-
for x in prefix(root):
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93
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+
for x in prefix(root):
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94
94
|
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|
95
|
-
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|
95
|
+
print(x, end="")
|
|
96
96
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97
97
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98
98
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