File Operations (OOP)

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C++

if(choice ==3){
        string title = "";
        ofstream myfile ("shows.txt");
        if (myfile.is_open())
        {
            cout << "Enter the title of the new show: ";
            cin >> title;
            
            myfile << title << endl;
            myfile.close();
        }
        else cout << "Operation Failed";
  }

When I ask the user to enter the name of a new show, it iss automatically placed at the beginning, over-writing whatever value is in the first line. How do I add a new line at the bottom of the text file, then add the user's input to that line?

Posted 27-Dec-13 16:32pm

Member 10436484

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Ron Beyer · Accepted Answer · 2013-12-27T16:37:00

Solution 1

You need to seek to the end of the file before writing to it, see http://www.cplusplus.com/reference/ostream/ostream/seekp/[^]

So your call would look something like:

C++

if (myfile.is_open())
        {
            myfile.seekp(0, ios_base::end);    //Seek to end of file.
            cout << "Enter the title of the new show: ";

[Edit]

Alternatively, you can do this when you open the file with the following overload:

C++

std::ofstream myfile ("shows.txt", std::ofstream::app);

Posted 27-Dec-13 16:37pm

Ron Beyer

Updated 27-Dec-13 16:42pm

v2

Comments

Sergey Alexandrovich Kryukov 27-Dec-13 22:45pm

5ed. It looks like you ignored the OP's requirement to open a new line for a user to input, but not doing so is actually better.
—SA

Ron Beyer 27-Dec-13 22:49pm

Thanks, I figured the wording was off, and he didn't mean put a blank line and then the data, but to insert a slot for new data, which isn't necessary if you are just appending to the end of the file.

Sergey Alexandrovich Kryukov 27-Dec-13 22:55pm

Sure.
—SA

Member 10436484 27-Dec-13 22:50pm

I went with the second solution which works perfectly. I think there was a slight error with the first. Thank you for your assistance.

-Kevin.