Finding a specific line from text file

[Pip3mAn]

Hey guys im trying to find a specific line or word from a text file and i cant seem to figure out how to do that. Now i want to find the destination from a text file the destination can be for example New York, Washington,or Texas now i want to read from the text file and find one of these destinations and by that i mean that the user will pick one of the above mentioned destinations which is then stored in a text file and then i need to read from the text file and store it in a string variable and display it. Here is what i have so far..

// Creating a ifstream object to read from the text file data.txt...
    ifstream readFromFile("Data.txt",ios::in);

    // Creating a string variable.
    string data;

    while(!readFromFile.eof()){ // I cant figure out what to add here so that the code will find and store the destination.
        getline(readFromFile,data);
    }

    cout << data;

[sockless]

You could try strcmp: http://www.cplusplus.com/reference/clibrary/cstring/strcmp/

It's from cstring, so I don't know if it would work with a c++ string, I usually steer away from IOstream and towards cstdio, it's faster and in my opinion, easier to work with.

[Lynx876]

Or you could try the .find() member function:
http://www.cplusplus.com/reference/string/string/find/

[Pip3mAn]

Any other ideas ? these don't really look so helpful.

[Moschops]

They are helpful. They are good solutions (the string find() member function is the better choice for your level). Why don't you like them?

[Pip3mAn]

because i think you cant use it when reading from a text file maybe an example of it being used would be good.

[Aramil of Elixia]

you don't need ios::in for ifstream because that is the default

[Pip3mAn]

hmm yes i do know that just typed it anyway i guess next time i wont.

[Aramil of Elixia]

just letting you know

[Pip3mAn]

Thank you. Now would anyone here give me an example on how to use that find function to find a line in a text file?

[Stewbond]

Something like this?

string Destinations[3] = {"New York", "Washington", "Texas"};
// Creating a ifstream object to read from the text file data.txt...
    ifstream readFromFile("Data.txt");

    // Creating a string variable.
    string data;

    while(!readFromFile.eof()){ // I cant figure out what to add here so that the code will find and store the destination.
        getline(readFromFile,data);

        for (int i = 0; i < 3; i++)
                if (data.find(Destinations[i])!=string::npos) cout << Destinations[i] << endl;
    }

[Pip3mAn]

That worked pretty well thanks. Now i get how to use the find function thanks for that too.