Answer to Question #27280 in C++ for Michael O' Callaghan

Question

In C++ ,using Borland, how can you extract data such as Account Number, Name and Balance, from a text file? Then edit that data and save it back to the file? There are several lines of data in the file, so how do you find and edit the one you want?

Answer 1

First of all you must set attributes of lines, to
determine what line it is. It can be done in many ways, but two of them is
pretty easy.


1. Ini files. https://en.wikipedia.org/wiki/INI_file


       Entry of
file will be like


                some_info...


                Account=1247676745


                Number=1558345


                Name=John


                More_info...


2. xml files


       Entry:


                <params>


                               <Account>


                                               128676346


                               </Account>


                               <
Number >


                                               1558345


                               </
Number >


                               <
Name >


                                               John


                               </
Name >


                               Some
other data


                </params>


 


To parse and edit such file you can opn them with read
and write mode


(https://www.cplusplus.com/doc/tutorial/files/)
using ios::in | ios::out mode.


Or use this thing for c++


https://www.codeproject.com/Articles/17353/XML-Application-Profile-Class