擅长:python、mysql、java
<p>你应该这样写代码:</p>
<pre><code>x = sqrt(r ** 2 - y ** 2)
line = Line(Point(-10, 0), Point(10, yinter))
line.draw(win)
Line(Point(-10,0) is wrong, it should read:
Line(Point(-10,yinter).
</code></pre>
<p>同时设置<code>Xroot1</code>和<code>Xroot2 = 0</code>或{<cd3>}</p>