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Thread: String class question

  1. #1
    Join Date
    May 2006

    String class question

    Say I have the following code:

    string dog;
    char cat;
    cin >> cat;

    if (dog.find(cat)!=string::npos)
    cout << "Yup, " << cat << " is in the dog string";

    I know what the code does, however, I'm a bit fuzzy on why the if statement would return either true or false. Could anyone explain the string::npos thing to a newb like me (my book is a bit vague on the subject).


  2. #2
    Join Date
    Jan 2006

    Re: String class question

    The various find() member functions of std::string return the index of (the first character of) the matching portion of the string, and std::string::npos if it is not found. So, if the return value is not equal to std::string::npos then there must have been a match.
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  3. #3
    Join Date
    May 2006

    Re: String class question

    Ah, thanks

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