code

import turtle
import math
turtle.speed(0)

# 画一个平方的函数

turtle.penup()
turtle.goto(-100, 0.01*100*100)
turtle.pendown()
for i in range(-100, 100):
    turtle.goto(i, 0.01*i*i)

turtle.penup()
turtle.goto(-160, 0)
turtle.pendown()
turtle.goto(160, 0)
turtle.write("x", font=("宋体",15))
turtle.goto(150, 10)
turtle.goto(160, 0)
turtle.goto(150, -10)

turtle.penup()
turtle.goto(0, -160)
turtle.pendown()
turtle.goto(0, 160)
turtle.write("y", font=("宋体",15))
turtle.goto(-10, 150)
turtle.goto(0, 160)
turtle.goto(10, 150)



turtle.hideturtle()

turtle.done()