寻找地图技术

looking for maps techniques

这是我正在使用的代码 on.it 从字符串中获取字数,但现在我一直在尝试使用地图应用相同的逻辑,但无法这样做,因为地图无法获取键值在 运行 time.how 我可以每次将字符串中的每个单词存储在不同键中的键中,以便我可以获得实际的字数。知道我该怎么做吗?

 #include<iostream>
 #include<conio.h>
 #include<string>


 using namespace std;

 int main()
{

    map<string, int> stringCounts;
    map<string, int>::iterator iter;
    string words;


    int TOTAL = 0;
    char a[1000];
    cout << "enter the string = ";
    cin.getline(a, 1000);
    int Totalwords = 0;
    int no = 0;

    for (int i = 0; a[i] != '[=10=]'; i++)
    {
        if ((int(a[i]) >= 65 && int(a[i]) <= 90) || (int(a[i]) >= 97 && int(a[i]) <= 122))
        {

        }
        else
        {
            Totalwords++;
        }
        no = i;
    }

    TOTAL = Totalwords;
    cout << "number of words = " << TOTAL << endl;
    string *words = new string[TOTAL];


    for (int i = 0, j = 0; j < TOTAL, i <= no;)
    {
        if ((int(a[i]) >= 65 && int(a[i]) <= 90) || (int(a[i]) >= 97 && int(a[i]) <= 122))
        {
            words[j] = words[j] + a[i];
            stringCounts[words[j]]++;
       for (iter = stringCounts.begin(); iter != stringCounts.end(); iter++)
      {
        cout << "word: " << iter->first << ", count: " << iter->second << 
        endl;
      }
            i++;
        }
        else
        {
            j++;
            i++;
        }
    }

    _getch();
}

how can i store each word in a key from a string in a different keys each time so that i can get actual word count .

这可以按如下方式完成。您甚至可以处理给定句子/字符串的每个单词(假设每个单词都被 space 分隔)。

注意几点:

  1. 如果您使用 C++,请坚持使用 C++ std 库(#include<conio.h> 已在您的解决方案中使用)
  2. 避免练习 using namespace std;
  3. 如果你想使用 std::map<>,你必须包含 header <map>

例如,这是一个示例测试输出:https://www.ideone.com/KGua1M

#include <iostream>
#include <map>
#include <string>
#include <sstream>

 int main()
{
   std::string inputString;
   std::cout << "Enter the string = ";
   std::getline(std::cin, inputString);

   std::map<std::string, int> Map; // word, no. of times
   size_t wordCount = 0;
   size_t letterCount = 0;

   std::stringstream sstr(inputString);
   std::string word;

   while (std::getline(sstr, word, ' '))
   {
       Map[word]++;
       wordCount++;
       letterCount += word.size();
   }

   std::cout << "Total Words: " << wordCount << "\n\n";
   std::cout << "Total letters: " << letterCount << "\n\n";
   std::cout << "Each words count\n\n"  ;

   for(const auto& it: Map)
    std::cout << it.first << " " << it.second << " times\n";
   return 0;
}