C++ newbie: how to extract data from a text file?

[Antst]

Hi everyone:

I have text files that contain a lot of data. I know how to read in an entire file, but not how to extract only some of the data from the file. I would really appreciate it if someone could help, perhaps with a short example.

I want to write a function that extracts strings (the names of people, for example). The text file is the output from a calculation and the names will change for each calculation.

Thanks a lot for any help.

 

[Nick T]

Since you don't give any example data how can we possibly tell you how your file should be parsed?
Give us more information and we can try to help, but at the moment its like saying I have a book, whats on page 67....

If you know how to read the whole file then you already know how to do what you need. Reading a subset of the data is only a case of reading all of it but discarding anything that you don't want.