蓝桥杯例题练习（简单）--绘制四叶风车

#利用turtle绘制四叶风车 ，要求：风车叶子颜色填充为红黄蓝绿,边长100

##思路：由于绘制的是四叶风车，因此在绘制时可能存在重复代码段，可以考虑将其嵌入循环之中以节省代码量和人力

##基础准备：
##turtle.setheading(角度)/turtle.seth(角度),设置画笔朝向，初始朝向为正右，朝向改变为逆时针方向变化
##turtle.shape(形状),可以改变画笔的形状
##turtle.circle(半径，弧度，绘制弧度图形所需要的步骤)，正半径表示向上画圆弧，负半径表示向下画圆弧
##颜色填充函数，beginfill()与endfill()


#第一种方法：

import turtle as tu
Color_list=["red","yellow","blue","green"]

tu.begin_fill()
tu.fillcolor(Color_list[0])
tu.forward(100)
tu.right(90)
tu.circle(-100, 45)
tu.right(90)
tu.forward(100)
tu.left(135)
tu.end_fill()

tu.begin_fill()
tu.fillcolor(Color_list[1])
tu.forward(100)
tu.right(90)
tu.circle(-100,45)
tu.right(90)
tu.forward(100)
tu.end_fill()

tu.begin_fill()
tu.fillcolor(Color_list[2])
tu.left(135)
tu.forward(100)
tu.right(90)
tu.circle(-100,45)
tu.right(90)
tu.forward(100)
tu.end_fill()

tu.begin_fill()
tu.fillcolor(Color_list[3])
tu.left(135)
tu.forward(100)
tu.right(90)
tu.circle(-100,45)
tu.right(90)
tu.forward(100)
tu.end_fill()

#由上述代码观察到，每次绘制图形时有固定的步骤规律，因此可考虑将其嵌入循环之中，第二种方法如下

for i in range(4):
    tu.begin_fill()
    tu.fillcolor(Color_list[i])
    tu.forward(100)
    tu.right(90)
    tu.circle(-100, 45)
    tu.right(90)
    tu.forward(100)
    tu.left(135)
    tu.end_fill()

tu.done()