从文件中逐行读取数字并添加到链表中

class ListNode:
    def __init__(self, val=0, next=None):
        self.val = val
        self.next = next

def read_numbers_from_file(file_path):
    # 创建空链表
    head = ListNode()
    current = head

    # 打开文件
    with open(file_path, 'r') as file:
        # 逐行读取数字
        for line in file:
            # 将一行内容转换为数字
            number = int(line.strip())

            # 创建链表节点并添加数字
            current.next = ListNode(number)
            current = current.next

    # 返回链表的头节点
    return head.next

# 示例用法
file_path = 'numbers.txt'  # 文件路径
result = read_numbers_from_file(file_path)