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Commit
9b975ce4
authored
3 years ago
by
BellCodeEditor
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diy2.py
diy2.py
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9b975ce4
# 尝试编写func()函数输出斐波那契数列的第十五个数是什么?
# 斐波那契数列:1,1,2,3,5,8,13,21,34,55……
def
func
(
n
):
if
n
<=
2
:
return
1
elif
n
>
2
:
value
=
func
(
n
-
1
)
+
func
(
n
-
2
)
return
value
result
=
func
(
15
)
print
(
func
(
15
))
#调用函数并打印结果
import
turtle
pen
=
turtle
.
Turtle
()
pen
.
color
(
'sienna'
)
#画布大小
w
=
turtle
.
Screen
()
w
.
bgcolor
(
"wheat"
)
#移动到起点
pen
.
left
(
90
)
pen
.
up
pen
.
backward
(
150
)
pen
.
down
#分形树
def
tree
(
n
):
if
n
>=
50
:
pen
.
forward
(
n
)
pen
.
right
(
30
)
tree
(
n
-
50
)
pen
.
left
(
60
)
tree
(
n
-
50
)
pen
.
right
(
30
)
pen
.
up
()
pen
.
backward
(
n
)
pen
.
down
()
tree
(
100
)
turtle
.
done
()
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