How to read a file into vector in C++?

Question

I need to read from a .data or .txt file containing a new float number on each line into a vector.

I have searched far and wi

Answer 1

  //file name must be of the form filename.yourfileExtension
       std::vector source;
bool getFileContent(std::string & fileName)
{
    if (fileName.substr(fileName.find_last_of(".") + 1) =="yourfileExtension")
    {

        // Open the File
        std::ifstream in(fileName.c_str());

        // Check if object is valid
        if (!in)
        {
            std::cerr << "Cannot open the File : " << fileName << std::endl;
            return false;
        }
        std::string str;
        // Read the next line from File untill it reaches the end.
        while (std::getline(in, str))
        {
            // Line contains string of length > 0 then save it in vector
            if (str.size() > 0)
                source.push_back(str);
        }
        /*for (size_t i = 0; i < source.size(); i++)
    {
        lexer(source[i], i);
        cout << source[i] << endl;
    }
    */
        //Close The File
        in.close();
        return true;
    }
    else
    {
        std::cerr << ":VIP doe\'s not support this file type" << std::endl;
        std::cerr << "supported extensions is filename.yourfileExtension" << endl;
    }
}