条件、循环、函数定义 练习

1. 画五角星

   import turtle
   
   
   for i in range (5):
       turtle.forward(100)
       turtle.right(144)

   
2. 画同心圆

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

   
3. 画太阳花

   import turtle
   
   turtle.fillcolor('red')
   
   turtle.begin_fill()
   while True:
       turtle.forward(200)
       turtle.right(100)
   if(abs(turtle.pos()))<1:
   break
   turtle.end_fill()
   
   turtle.hideturtle()

4. 画五个五角星

   import turtle
   
   turtle.speed('fastest')
   turtle.setup(700,500,0,0)
   
   
   turtle.fillcolor('yellow')
   turtle.color('yellow')
   turtle.bgcolor('red')
   
   def my_goto(x,y):
       turtle.up()
       turtle.goto(x,y)
       turtle.down()
   
   
   def my_draw1(r):
       turtle.begin_fill()
   for i in range(5):
           turtle.forward(r)
           turtle.right(144)
       turtle.end_fill()
   
   my_goto(-300,75)
   my_draw1(100)
   
   my_goto(-225,170)
   turtle.left(50)
   my_draw1(50)
   
   my_goto(-150,93)
   turtle.left(44)
   my_draw1(50)
   
   my_goto(-120,0)
   turtle.left(50)
   my_draw1(50)
   
   my_goto(-180,-50)
   turtle.left(50)
   my_draw1(50)

   

   5. 画◇花瓣的太阳花

   import turtle
   
   turtle.color('orange')
   turtle.bgcolor('purple')
   for i in range(1,73):
       turtle.speed('fastest')
       turtle.left(10)
       turtle.forward(100)
       turtle.right(45)
       turtle.forward(100)
       turtle.right(135)
       turtle.forward(100)
       turtle.right(45)
       turtle.forward(100)