80 lines
2.4 KiB
Python
80 lines
2.4 KiB
Python
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def ll_insert(head, name, phone):
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current = head
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# Проверяем, существует ли уже такой абонент
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while current is not None:
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if current['name'] == name:
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current['phone'] = phone
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return head
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current = current['next']
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# Создаём новый узел
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new_node = {'name': name, 'phone': phone, 'next': None}
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# Если список пуст, новый узел становится головой
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if head is None:
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return new_node
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# Иначе проходим в конец и вставляем
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current = head
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while current['next'] is not None:
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current = current['next']
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current['next'] = new_node
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return head
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def ll_find(head, name):
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current = head
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while current is not None:
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if current['name'] == name:
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return current['phone']
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current = current['next']
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return None
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def ll_delete(head, name):
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if head is None:
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return None
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# Если удаляемый элемент — голова
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if head['name'] == name:
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return head['next']
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prev = head
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current = head['next']
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while current is not None:
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if current['name'] == name:
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prev['next'] = current['next']
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return head
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prev = current
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current = current['next']
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return head
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def ll_list_all(head):
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records = []
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current = head
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while current is not None:
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records.append((current['name'], current['phone']))
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current = current['next']
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records.sort(key=lambda x: x[0])
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return records
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# --------------------- Тестирование связного списка ---------------------
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if __name__ == "__main__":
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print("=== Тестирование связного списка ===")
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head = None
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head = ll_insert(head, "Ivan", "123-456")
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head = ll_insert(head, "Boris", "789-012")
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head = ll_insert(head, "Anna", "345-678")
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head = ll_insert(head, "Ivan", "111-222") # обновление
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print("Все записи:", ll_list_all(head))
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print("Телефон Ivan:", ll_find(head, "Ivan"))
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print("Телефон Boris:", ll_find(head, "Boris"))
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print("Телефон Noname:", ll_find(head, "Noname"))
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head = ll_delete(head, "Boris")
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print("После удаления Boris, все записи:", ll_list_all(head))
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