File not saving, or not - c++

Question

I cannot seem to figure out why, during the while loop at the bottom,
std::cout << line;
does not print anything.
I believe that the test.txt file is not actually being written to because when I open test.txt in my folder, its empty. Any thoughts?
void Ticket::WriteTicket()
{
std::string ticketInput;
std::ofstream ticketFile("test.txt");
ticketFile.open("test.txt");
std::cout << "Please Enter Ticket Information: " << std::endl;
getline(std::cin, ticketInput);
std::cout << ticketInput << std::endl; //does print out the line
ticketFile << ticketInput;
ticketFile.close();
//here for testing only
std::string line;
std::ifstream ticketRead("test.txt");
while(getline(ticketRead, line));
{
std::cout << "something here?: " << line; // there is nothing here when it outputs
}
}
EDIT (SOLUTION):
After using some of the information that was given above, mainly from Basile Starynkevitch (I put this here because I cannot upvote yet), I was able to get the code to work!
I also did some research in my book and copied a similar program's style. Aka where to put what part of the code, and then the input worked. I continued on with the output and the key part was the std::ifstream::in in the opening of the file for output.
void Ticket::WriteTicket()
{
std::string ticketInput;
std::cout << "Please Enter Ticket Information: " << std::endl;
getline(std::cin, ticketInput);
std::ofstream ticketFile("Ticket.txt");
ticketFile << ticketInput << std::endl;
ticketFile.close();
//here for testing
std::ifstream ticketRead;
ticketRead.open("Ticket.txt", std::ifstream::in);
std::string line;
while(getline(ticketRead, line))
{
std::cout << line << std::endl;
}
}
Thank you for the help everyone!

Answer 1

You need to flush the output buffer.
ticketFile << ticketInput;
should be
ticketFile << ticketInput << std::endl;
std::endl flushes the output buffer.See std::flush if you don't want the new line.

Answer 2

C++ I/O is buffered. At least code
std::cout << "something here?: " << line << std::flush;
but in your case
std::cout << "something here?: " << line << std::endl;
would be better.
Also
std::ofstream ticketFile("test.txt")
should probably be
std::ofstream ticketFile("test.txt", std::ios_base::out);
I strongly suggest taking some hours to read more about C++ libraries before coding. Check every function or class that you are using. Of course, you also need to std::flush on ticketFile.

Answer 3

Maybe the file need to be openned in write mode.
Try this
std::ofstream ticketFile("test.txt","w");