如何输出哈希表的数值

输出哈希表（也叫散列表）的数值通常取决于具体的语言和数据结构实现。以下是几种常见编程语言中输出哈希表内容的方式：

1. **Python (dict)**:

   hash_table = {'key1': 10, 'key2': 20}
   for key, value in hash_table.items():
       print(f"{key}: {value}")

2. **JavaScript (Object)**:

   let hashTable = {key1: 10, key2: 20};
   for (let key in hashTable) {
       console.log(key + ": " + hashTable[key]);
   }

3. **Java (HashMap)**:

   Map<String, Integer> hashTable = new HashMap<>();
   hashTable.put("key1", 10);
   hashTable.put("key2", 20);
   
   for (Map.Entry<String, Integer> entry : hashTable.entrySet()) {
       System.out.println(entry.getKey() + ": " + entry.getValue());
   }

4. **C# (Dictionary)**:

   Dictionary<string, int> hashTable = new Dictionary<string, int>();
   hashTable.Add("key1", 10);
   hashTable.Add("key2", 20);

   foreach (KeyValuePair<string, int> pair in hashTable)
       Console.WriteLine(pair.Key + ": " + pair.Value);

5. **C++ (unordered_map)**:

   std::unordered_map<std::string, int> hashTable;
   hashTable["key1"] = 10;
   hashTable["key2"] = 20;

   for (const auto &pair : hashTable)
       std::cout << pair.first << ": " << pair.second << "\n";

请注意，每种语言的语法可能会有所不同，上述例子展示了基本的思想。