How to store words from the sentence

I have the following C++ code that calculates the total number of words and stores the the value in count variable.
So, the question is how can I store those particular words from a sentence in a variable so I can later use them to match the words in the sentence if I pass a word to match with.

Thanks for the help.

#include <iostream>
#include <cstring>
#include <new>
#include <cctype>

int wordsInString(const char* );

int main()
{
    wordsInString("My name is Donnie");
    return 0;
}

int wordsInString(const char* s)
{
    int count = 0;
    int len = strlen(s);
    int i;
    for(i=0;i<len;i++)
    {
        while(i<len && (s[i] == ' ' || s[i] == '\t' || s[i] == '\n'))
        {
            i++;
        }
        if(i<len)
        {
            count++;
            while(i<len && (s[i] != ' ' && s[i] != '\t' && s[i] != '\n'))
            {
                i++;
            }
        }
    }
    std::cout << "The total count: " << count << std::endl;
    return count;
}```

>Solution :

Perhaps I misunderstood the problem in my initial comments, but if you just want to count the number of space-delimited "words" in a string, then I recommend using an std::istringstream for the string, then use a loop extracting the space-delimited "words" one by one using the normal input operator >> into a dummy string variable, and increase a counter in the loop.

Perhaps something like this:

unsigned wordsInString(std::string const& string)
{
    // A stream we can read words from
    std::istringstream stream(string);

    // The word counter
    unsigned word_counter;

    // A dummy string, the contents of the string will never be used
    std::string dummy;

    // While we can read words from the stream, increase counter
    for (word_counter = 0; stream >> dummy; ++word_counter)
    {
        // Empty
    }

    // Return the counter
    return word_counter;
}

This works because:

• The result of the >> stream extract operator is the stream itself, and when converted to a boolean value it will be false when we reach the end of the stream, which breaks the loop; And

• The stream extraction operator separates on white-space (space, newline, tab, etc.); And

• For each successful extraction of a word from the stream, we will increase the counter, so the loop counts the "words" in the stream.