条件、循环、函数定义 练习

1. 画五角星

2. import turtle
   for i in range(5):
       turtle.forward(200)
       turtle.right(144)

   

    

3. 画同心圆

4. import turtle
   for i in range(5):
       turtle.circle(20*(1+i))
       turtle.up()
       turtle.goto(0,-20*(1+i))
       turtle.down()
   turtle.done()

   

    

5. 画太阳花

6. import turtle
   from turtle import *
   turtle.color('red','yellow')
   turtle.begin_fill()
   while True:
       turtle.speed(10)
       turtle.forward(200)
       turtle.left(170)
       if (abs(pos()))<1:
           break
   turtle.end_fill()
   turtle.done()

   

    

7. 画五个五角星

8. import turtle
   turtle.fillcolor('red')
   turtle.speed(10)
   
   def my_goto(x,y):
       turtle.up()
       turtle.goto(x,y)
       turtle.down()
   def my_cd(s):
       turtle.forward(s)
       turtle.left(90)
   def my_draw5(r):
       turtle.begin_fill()
   for i in range(5):
           turtle.forward(r)
           turtle.right(144)
       turtle.end_fill()
   
   
   
   #国旗红底
   turtle.begin_fill()
   my_goto(-270,-180)
   my_cd(550)
   my_cd(330)
   my_cd(550)
   my_cd(330)
   turtle.end_fill()
   turtle.fillcolor('yellow')
   turtle.color('yellow')
   my_goto(-195,99)
   my_draw5(90)
   
   turtle.left(30)
   my_goto(-75,130)
   my_draw5(30)
   
   
   my_goto(-45,100)
   my_draw5(30)
   
   turtle.right(30)
   my_goto(-45,60)
   my_draw5(30)
   
   turtle.right(20)
   my_goto(-75,21)
   my_draw5(30)
   turtle.done()

   

    

9. 画◇花瓣的太阳花

10. import turtle
    turtle.speed(10)
    turtle.bgcolor('blue')
    turtle.fillcolor('red')
    def my_draw(s):
        turtle.begin_fill()
        turtle.forward(s)
        turtle.right(45)
        turtle.forward(100)
        turtle.right(135)
        turtle.forward(s)
        turtle.right(45)
        turtle.forward(100)
        turtle.right(135)
        turtle.end_fill()
    
    for i in range(1,37):
        my_draw(100)
        turtle.left(10)
    
    turtle.right(90)
    turtle.forward(300)
    turtle.done()