HELP! C++ Questions

Please try to do as many as you can.

What is invoted in a labeled data format? What problems could be involved if you try to use the stream translation/extraction with this format? (Something about spacing and a separator?) How does this format give the end-user more freedom when creating editing their data files? If you haw read too far' in a file - i.e. you need to back up'within the file - what step(s) would be necessary to do this? (For instance, you've just read a line and realized after-the-fact that it wasn't your' data but that of the next 'record'. How do you tell the file to move back to the beginning of that line so that when the next object reads itself, that line will be mailable to be part of its data?) 33) If you've already read through some/all of a file once, but now need to go back to the beginning to re-process the data, show the step