擅长:python、mysql、java
<p>如果没有导入,只需将句子中的字符替换为空字符串,然后比较两个句子的长度:</p>
<pre><code>sentence = input("Please enter a sentence:")
character = input("Please enter a single character:")
counter = len(sentence) - len(sentence.replace(character, ''))
</code></pre>
<p>把它放在一个循环中:</p>
<pre><code>sentence = input("Please enter a sentence:")
while 1:
character = input("Please enter a single character:")
print(len(sentence) - len(sentence.replace(character, '')))
</code></pre>