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Outputting First Word of each Sentence - Strings

Anontk7 (1)
Hi everyone.

I have been trying to get this to work for a while now - with no success.

Basically I am trying to write a function which the returns the first word of each input sentence in a single string - this is part of a larger cryptography program I am working on.

So for example, if this string was passed into the function:

"This is what I mean. Is it right? A poor puppy abandoned. Secret torturing of dogs are happening. Message: be on the watch."

It should return:

This Is A Secret Message:


This is the code I have so far:

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//declared in class "steganalyse"
string cyphertext;
string punctuation = ".?!;:'";
book is_first_word

//function that is going wrong
string steganalyse::first_words()
{
    string letters = "";
    bool space_override = false;
 
    for (int i = 0; i < cyphertext.size(); i++)
    {
       if(is_new_sentence == true)
       {
          letters = letters + cyphertext[i];
          
          if(cyphertext[i] == ' ')
          {
            if(space_override == true)
            {
              space_override == false;
            }
 
            else
            {
              is_first_word = false;
            }
          }
       }

       else
       {
          if(cyphertext[i] == punctuation[0] || cyphertext[i] == punctuation[1] || 
cyphertext[i] == punctuation[2])
          {
             is_first_word = true;
         
             if(cyphertext[i+1] == ' ')
             {
                space_override == true; /*To make 
sure is_first_word is not set to false at the first
space after the . or ! or ? */
             }
          }
        }
            
     }

	return letters;
}


But this only returns the first word:

This


If anyone could show me how to fix my code, or has another way to return the first word of each sentence in a string I would be very grateful.
zoran404 (263)
Maybe it has something to do with the fast that you never change the value of is_new_sentence ?
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