条件、循环、函数定义 练习

a.画五角星、

import turtle
turtle.color('yellow')
turtle.fillcolor('yellow')
turtle.bgcolor('red')
turtle.begin_fill()

for i in range(5):
    turtle.up()
    turtle.forward(100)
    turtle.right(144)
turtle.end_fill()
turtle.hideturtle()

b.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+1))

c.画太阳花

import turtle
while True:
    turtle.forward(200)
    turtle.left(170)
    if(abs(turtle.pos()))<1:
       break
    turtle.hideturtle()

d.画五个五角星

import turtle

turtle.color('yellow')
turtle.fillcolor('yellow')
turtle.bgcolor('red')
def yf_goto(x,y):
    turtle.up()
    turtle.goto(x,y)
    turtle.down()

yf_goto(-600,250)
turtle.begin_fill()
for i in range(5):
    turtle.forward(100)
    turtle.right(144)
turtle.end_fill()

yf_goto(-450,290)
turtle.begin_fill()
for i in range(5):
    turtle.forward(50)
    turtle.right(144)
turtle.end_fill()

yf_goto(-420,225)
turtle.begin_fill()
for i in range(5):
    turtle.forward(50)
    turtle.right(144)
turtle.end_fill()

yf_goto(-445,165)
turtle.begin_fill()
for i in range(5):
    turtle.forward(50)
    turtle.right(144)
turtle.end_fill()

yf_goto(-485,110)
turtle.begin_fill()
for i in range(5):
    turtle.forward(50)
    turtle.right(144)
turtle.end_fill()
turtle.hideturtle()

e.画菱形花瓣的太阳花

import turtle

def draw_flower(ff):
    ff.forward(100)
    ff.right(45)
    ff.forward(100)
    ff.right(135)

def draw_huahua():

    window=turtle.Screen()
    window.bgcolor('pink')

    ff=turtle.Turtle()
    ff.shape("turtle")
    ff.color("red")
    ff.speed('fastest')

    for i in range(1,37):
        draw_flower(ff)
        draw_flower(ff)
        ff.left(10)

    ff.right(90)
    ff.foeward(300)

    window.exitionclick()

draw_huahua()