从文件shop.txt中读取商家信息,存入顺序表中。随后创建链地址散列表,向其中插入顺序表中的每一条记录。输入商家名称,调用基于链地址法的散列查找算法,判断散列表中是否存在该商家。如果存在,说明查找成功,按照特定的格式输出商家信息;否则,输出“查找失败”
时间: 2024-04-08 10:30:09 浏览: 114
实验1 顺序表实验1)练习类的定义和对象的创建;2)联系顺序表的定义和使用
您好!针对您的问题,我将提供一个可能的解决方案。首先,可以使用以下代码从文件中读取商家信息并存入顺序表中:
```python
class Business:
def __init__(self, name, address, phone):
self.name = name
self.address = address
self.phone = phone
def read_business_info(file_name):
business_list = []
with open(file_name, 'r') as file:
for line in file:
name, address, phone = line.strip().split(',')
business = Business(name, address, phone)
business_list.append(business)
return business_list
```
接下来,我们可以创建链地址散列表,并将顺序表中的每一条记录插入散列表中。这里使用商家名称作为关键字进行散列:
```python
class Node:
def __init__(self, key, value):
self.key = key
self.value = value
self.next = None
class HashTable:
def __init__(self, size):
self.size = size
self.table = [None] * size
def hash_function(self, key):
return hash(key) % self.size
def insert(self, key, value):
index = self.hash_function(key)
if self.table[index] is None:
self.table[index] = Node(key, value)
else:
node = self.table[index]
while node.next is not None:
node = node.next
node.next = Node(key, value)
def create_hash_table(business_list):
hash_table = HashTable(len(business_list))
for business in business_list:
hash_table.insert(business.name, business)
return hash_table
```
最后,您可以输入商家名称,调用基于链地址法的散列查找算法来判断散列表中是否存在该商家,并按照特定的格式输出商家信息:
```python
def search_business(hash_table, name):
index = hash_table.hash_function(name)
node = hash_table.table[index]
while node is not None:
if node.key == name:
return node.value
node = node.next
return None
business_list = read_business_info('shop.txt')
hash_table = create_hash_table(business_list)
search_name = input("请输入商家名称:")
result = search_business(hash_table, search_name)
if result is not None:
print("查找成功!商家信息如下:")
print("名称:", result.name)
print("地址:", result.address)
print("电话:", result.phone)
else:
print("查找失败")
```
请注意,上述代码仅提供了一个示例实现,您可能需要根据实际情况进行适当的修改。另外,您需要确保文件`shop.txt`中的商家信息按照一定的格式进行存储,每行包含商家名称、地址和电话,用逗号分隔。
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