第二周练习

import turtle

turtle.pensize(5)
turtle.pencolor("yellow")
turtle.fillcolor("red")

turtle.begin_fill()
for i in range(5):
    turtle.forward(100)
    turtle.right(144)
    turtle.forward(100)
    turtle.left(72)
turtle.end_fill()

turtle.hideturtle()
turtle.done()

import turtle

radius = eval(input()) #接收用户输入的半径并转换成数值
number = eval(input())   #接收用户输入的画笔宽度并转换成数值
cl = input()           #接收用户输入的颜色

turtle.pencolor(cl)
turtle.goto(0,0)
for i in range(number):
    turtle.circle(radius)      #画圆
    radius=radius+20    #修改半径的值
    turtle.penup()             #抬起笔
    turtle.goto(0, -20*(i+1))     #移动到新的起点，下一个圆的最低点
    turtle.pendown()           #落笔
turtle.hideturtle()
turtle.done()

import turtle

number = int(input())      #把用户输入转成整数
turtle.screensize(600,500,‘white‘)
turtle.pensize(3)           #设置画笔宽度为3
turtle.pencolor(‘blue‘)    #设置画笔颜色为黑色
turtle.fillcolor(‘yellow‘)  #设置填充颜色为黄色
turtle.begin_fill()         #开始填充
#turtle.forward(-50)

for i in range(3,number):
    turtle.circle(50, steps=i)
    turtle.forward(100)
turtle.circle(50, steps=number)
if number == 1:
    turtle.circle(50)
else:
    turtle.forward(100)
    turtle.circle(50)

turtle.end_fill()
turtle.hideturtle()         #隐藏海龟
turtle.done()

import turtle

for i in range(3):
    turtle.forward(100)
    turtle.right(120)
turtle.left(60)
turtle.forward(100)
for i in range(3):
    turtle.right(120)
    turtle.forward(200)

turtle.hideturtle()
turtle.done()

coordA=(-110,0,110,-55,55)
coordB=(-25,-25,-25,-75,-75)
cl=("red","blue","green","yellow","black")
import turtle
turtle.pensize(5)
turtle.speed(0)
for i in range (5):
    turtle.color(cl[i])
    turtle. penup()
    turtle.goto(coordA[i],coordB[i])
    turtle.pendown()
    turtle.circle(45)
turtle.hideturtle()  
turtle.done()

import turtle

turtle.speed(0)
turtle.fillcolor(‘black‘)
turtle.begin_fill()
turtle.circle(120,180)
turtle.left(180)
turtle.circle(-60,180)
turtle.circle(60,180)
turtle.end_fill()
turtle.left(180)
turtle.circle(-120,180)
turtle.right(90)
turtle.penup()
turtle.fd(70)
turtle.left(90)
turtle.pendown()
turtle.fillcolor(‘black‘)
turtle.begin_fill()
turtle.circle(15)
turtle.end_fill()
turtle.right(90)
turtle.penup()
turtle.fd(130)
turtle.left(90)
turtle.pendown()
turtle.fillcolor(‘white‘)
turtle.begin_fill()
turtle.circle(15)
turtle.end_fill()
turtle.hideturtle()
turtle.done()

#画国际象棋盘，小格边长为width
import turtle
turtle.speed(0)
width = eval(input())

#画黑格
def drawSquare(width):
    turtle.pendown()
    turtle.begin_fill()
    turtle.fillcolor("black")
    for i in range(4):
        turtle.forward(width)
        turtle.left(90)
    turtle.end_fill()
    turtle.penup()

for i in range(8):
    if i % 2 == 0:#偶数行
        turtle.penup()
        turtle.goto(0, i * width)
        turtle.pendown()
        for j in range(4):
            drawSquare(width)
            turtle.fd(2 * width)
    else:
        turtle.penup()
        turtle.goto(width, i * width)
        turtle.pendown()
        for j in range(4):
            drawSquare(width)
            turtle.fd(2 * width)
turtle.penup()
turtle.goto(0,0)
turtle.pendown()
for i in range(4):
    turtle.forward(8 * width)
    turtle.left(90)
turtle.hideturtle()
turtle.done()