python第二周练习
1、画五角星
import turtle
turtle.pensize(5)
turtle.pencolor("yellow")
turtle.fillcolor("red")
turtle.begin_fill()
for i in range(5):
turtle.forward(200)
turtle.right(-72)
turtle.forward(200)
turtle.left(-144)
turtle.end_fill()
turtle.hideturtle()
turtle.done()
运行结果:
2、
import turtle
radius=int(input())
number=int(input())
color=input()
turtle.pensize(2)
turtle.pencolor(color)
for i in range(number):
turtle.circle(radius+i*10)
turtle.penup()
turtle.right(90)
turtle.forward(10)
turtle.left(90)
turtle.pendown()
turtle.hideturtle()
turtle.done()
输入:
20
4
red
运行结果:
3、渐变的圆
import turtle
n=int(input())
turtle.pensize(3)
turtle.pencolor("blue")
turtle.fillcolor("yellow")
turtle.begin_fill()
if n in [3,4,5,6,7,8,9]:
for i in range(7):
turtle.circle(50,steps=n+i)
turtle.forward(100)
turtle.circle(50)
else:
turtle.clear()
turtle.end_fill()
turtle.hideturtle()
turtle.done()
输入:
3
运行结果:
4、
import turtle
turtle.forward(100)
for i in range(2):
turtle.right(120)
turtle.forward(100)
turtle.right(60)
turtle.forward(100)
turtle.right(120)
for i in range(3):
turtle.forward(200)
turtle.right(120)
turtle.hideturtle()
turtle.done()
运行结果:
5、
import turtle
coordA=(-110,0,110,-55,55)
coordB=(-25,-25,-25,-75,-75)
colors=["red","blue","green","yellow","black"]
turtle.pensize(5)
for i in range(5):
turtle.color(colors[i])
turtle.penup()
turtle.goto(coordA[i],coordB[i])
turtle.pendown()
turtle.circle(45)
turtle.hideturtle()
turtle.done()
运行结果:
6、
import turtle
turtle.circle(100)
turtle.fillcolor('black')
turtle.begin_fill()
turtle.circle(50,-180)
turtle.end_fill()
turtle.circle(-50,-180)
turtle.begin_fill()
turtle.circle(-100,180)
turtle.end_fill()
turtle.circle(-100,180)
turtle.fillcolor('white')
turtle.begin_fill()
turtle.circle(-50,180)
turtle.end_fill()
turtle.penup()
turtle.right(90)
turtle.forward(40)
turtle.right(90)
turtle.fillcolor('black')
turtle.begin_fill()
turtle.circle(12)
turtle.end_fill()
turtle.penup()
turtle.right(90)
turtle.forward(80)
turtle.right(90)
turtle.fillcolor('white')
turtle.begin_fill()
turtle.circle(12)
turtle.end_fill()
turtle.hideturtle()
turtle.done()
运行结果:
7、画国际象棋盘
import turtle
s=int(input())
turtle.penup()
turtle.goto(-150,150)
turtle.pendown()
for i in range(4):
for i in range(4):
turtle.forward(s)
turtle.fillcolor('black')
turtle.begin_fill()
turtle.right(90)
turtle.forward(s)
turtle.left(90)
turtle.forward(s)
turtle.left(90)
turtle.forward(s)
turtle.right(90)
turtle.end_fill()
turtle.right(90)
turtle.forward(s)
turtle.right(90)
for i in range(4):
turtle.forward(s)
turtle.fillcolor('black')
turtle.begin_fill()
turtle.left(90)
turtle.forward(s)
turtle.right(90)
turtle.forward(s)
turtle.right(90)
turtle.forward(s)
turtle.left(90)
turtle.end_fill()
turtle.left(90)
turtle.forward(s)
turtle.left(90)
turtle.right(-180)
for i in range(4):
turtle.right(90)
turtle.fd(8*s)
turtle.hideturtle()
turtle.done()
输入:
50
运行结果: