擅长:python、mysql、java
<p>这是一个有效的例子</p>
<pre><code>max = int(input("enter The number of butterflies that is required: "))
count = 0
while count <= max:
butterfly=int(input("how many butterflys did u see: "))
if butterfly >=1:
count += butterfly
butterfly=input("how many did u see: ")
print("you have reached,",max)
</code></pre>