如何用Python制作带有turtle图形的线性图形计算器?

为什么当我试图绘制图形时,这段代码不起作用?

我认为有两个问题:1)你似乎做事情的顺序不对;2)你错误地认为如果y是f(x),那么f(-x)是-y,这不是真的:

from turtle import *

m = float(input("What is the slope? "))

b = float(input("What is the y-intercept? "))

x, y = window_width(), window_height()

# Draw Axes
penup()
goto(x / 2, 0)
pendown()
goto(-x / 2, 0)
penup()
goto(0, y / 2)
pendown()
goto(0, -y / 2)

# Plot function

y = int(m * x + b)

penup()
goto(x, y)

x = -x
y = int(m * x + b)

pendown()
goto(x, y)

done()

用法

> python3 test.py
What is the slope? 0.5
What is the y-intercept? 100
>

输出