擅长:python、mysql、java
<p>你需要把</p>
<pre><code>areaV, perimeterV = area(a, b, c)
</code></pre>
<p>用户输入后在主界面中。因为<code>a,b,c</code>是在main函数的作用域中定义的</p>
<p>应该是这样的:</p>
<pre><code>def main():
# The prompts.
a = int(input('Enter first side: '))
b = int(input('Enter second side: '))
c = int(input('Enter third side: '))
areaV, perimeterV = area(a, b, c)
# The output statements.
print ("The area is:", format(areaV,',.1f'),"and the perimeter is:", format(perimeterV, ',.1f'))
</code></pre>