save project

diy1.py

-#定义一个函数SB()
-#要求这个函数能接收一个名为SB的整型参数
-def func(n):
-    if n<=2:
-        return 1
-    elif n>2:
-        SB=func(n-2)+func(n-1)
-        return SB
-print(func(8))
\ No newline at end of file
+import turtle
+pen=turtle.Turtle()
+pen.color('sienna')
+w=turtle.Screen()
+w.bgcolor('wheat')
+pen.left(90)
+pen.up()
+pen.backward(150)
+pen.down()
+def tree(n):
+    if n>=50:
+        pen.fd(n)
+        pen.right(30)
+        tree(n-1)
+        pen.left(60)
+        tree(n-1)
+        pen.right(30)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+tree(100)
+turtle.done()
\ No newline at end of file