在计算机科学领域，考研代码是检验考生编程能力和理论知识的重要方式。以下是一份涵盖多个关键领域的原创考研代码示例：
```python
考研代码示例：数据结构——链表操作
class ListNode:
def __init__(self, value=0, next=None):
self.value = value
self.next = next
def create_linked_list(arr):
"""创建链表"""
head = ListNode(arr[0])
current = head
for value in arr[1:]:
current.next = ListNode(value)
current = current.next
return head
def print_linked_list(head):
"""打印链表"""
current = head
while current:
print(current.value, end=' ')
current = current.next
print()
def reverse_linked_list(head):
"""反转链表"""
prev = None
current = head
while current:
next_node = current.next
current.next = prev
prev = current
current = next_node
return prev
测试代码
if __name__ == '__main__':
arr = [1, 2, 3, 4, 5]
head = create_linked_list(arr)
print("原始链表：")
print_linked_list(head)
reversed_head = reverse_linked_list(head)
print("反转后的链表：")
print_linked_list(reversed_head)
```
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