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<p>我写这段代码是为了计算一个二次函数的根,当给定a,b,c的值为ax^2+bx+c=0时:</p>
<pre><code>a = input("a")
b = input("b")
c = input("c")
print("Such that ", a, "x^2+", b, "x+", c, "=0,")
def greaterzero(a, b, c):
x = (((b**2 - (4*a*c))**1/2) -b)/2*a
return x
def smallerzero(a, b, c):
x = (-1*((b**2 - (4*a*c))**1/2) -b)/2*a
return x
if smallerzero(a, b, c) == greaterzero(a, b, c):
print("There is only one zero for the quadratic given a, b, and c: ",
greaterzero(a, b, c))
else:
print ("The greater zero for the quadratic is ", greaterzero(a, b, c))
print ("The smaller zero for the quadratic is ", smallerzero(a, b, c))
</code></pre>
<p>当我执行程序(在交互模式下)并分别为a、b和c输入1、2和1时,这是输出:</p>
<pre><code>a1
b2
c1
Such that 1 x^2+ 2 x+ 1 =0,
Traceback (most recent call last):
File "jdoodle.py", line 13, in <module>
if smallerzero(a, b, c) == greaterzero(a, b, c):
File "jdoodle.py", line 11, in smallerzero
x = (-1*((b**2 - (4*a*c))**1/2) -b)/2
TypeError: unsupported operand type(s) for ** or pow(): 'str' and 'int'
</code></pre>
<p>这里有什么问题?
我还没有正式学会如何使用交互模式。我想要一个简单的解释/介绍或一个网站/教程,提供一个。你知道吗</p>