Question

我的代码我有问题要拿出值，这是通过使用键自己的单词的单词数那是我的代码，

template <typename T>
void BST<T>::clear(BTNode *subtree)
{
    if (subtree != nullptr)
    {
        clear(subtree->m_Left);
        clear(subtree->m_Right);
        delete subtree;
    }
}

拿出钥匙有问题。

Answer 1

我不知道你究竟有什么问题，但我有个主意。一个问题可能是您提供的单词不在字典中。这可能会导致KeyNotFoundException。一个简单的解决方案就是：

if(Dict.ContainsKey(word)){
    Console.WriteLine(Dict[word]);
} else {
    Console.WriteLine(0); //Or whatever you deem appropriate
}

您可能遇到的另一个问题是foreach(var item in Dict)。字典迭代元素对。变量item的推断类型为KeyValuePair<string,int>，而Console.WriteLine(item);可能无法打印您所期望的内容。尝试将Console.WriteLine(item)替换为Console.WriteLine(item.Key + " " +item.Value);

Answer 2

试试这个：

string str = "Alameer Ashraf Hassan Alameer ashraf,elnagar.";

        string[] CorpusResult = str.Split(' ', ',', '.');

       //Creating the Dictionary to hold up each word as key & its occurance as Value  ......! 
        Dictionary<string, int> Dict = new Dictionary<string, int>();

       //loopnig over the corpus and fill the dictionary in .........!
        foreach (string item in CorpusResult)
        {
            if (string.IsNullOrEmpty(item)) continue;

            if (Dict.ContainsKey(item))
            {
                Dict[item]++;
            }
            else
            {
                Dict.Add(item, 1);
            }
        }

        Console.WriteLine("Method 1: ");
        foreach (var item in Dict)
        {
            Console.WriteLine(item.Value);
        }

        Console.WriteLine("Method 2: ");
        foreach(var k in Dict.Keys)
        {
            Console.WriteLine(Dict[k]);
        }

.NET小提琴：https://dotnetfiddle.net/JZ9Eid

通过使用字典中的键来获取值

2 个答案: