擅长:python、mysql、java
<p>更改for循环中的<code>letter</code>变量,因为它与函数参数中的<code>letter</code>相同</p>
<pre><code>lettercount(userstr, userletter)
userstr = input("What is your sentence? ")
userletter = str(input("What is your letter? "))
def lettercount(sentence, letter):
count = 0
sentencecounter = 0
for ch in sentence:
if letter == sentence[sentencecounter]:
print(sentence[sentencecounter])
count += 1
else:
pass
sentencecounter += 1
print(count)
</code></pre>