返回字符串中最长的单词

def find_longest_word(s):
    words = s.split()
    longest_word = ""
    for word in words:
        if len(word) > len(longest_word):
            longest_word = word
    return longest_word

# 示例
sentence = "The quick brown fox jumps over the lazy dog"
print(find_longest_word(sentence))  # 输出: "jumps"

def find_longest_words(s):
    words = s.split()
    max_length = max(len(word) for word in words)
    longest_words = [word for word in words if len(word) == max_length]
    return longest_words

# 示例
sentence = "The quick brown fox jumps over the lazy dog"
print(find_longest_words(sentence))  # 输出: ['quick', 'brown', 'jumps']

def find_longest_word(s):
    if not s or s.isspace():
        return ""
    words = s.split()
    longest_word = ""
    for word in words:
        if len(word) > len(longest_word):
            longest_word = word
    return longest_word

# 示例
sentence = "   "
print(find_longest_word(sentence))  # 输出: ""