Solved

Reading text into an array from a file

Posted on 2000-03-28
1
180 Views
Last Modified: 2010-04-02
Hello!

I have a text file of approx 40,000 characters long and want to read it in character by character into an array...process it and then output it to a file. How do you read in for example 500 characters at a time...process them....then output the text to a new file. Then take the next 500 characters of the text and process that...etc.!
0
Comment
Question by:colleen_dana
1 Comment
 
LVL 22

Accepted Solution

by:
nietod earned 80 total points
ID: 2665600
fstream InFil("C:\\SOURCE.TXT",ios_base::in);
fstream OutFil("C:\\DESTINATION.TXT",ios_base::out);

const int BufSiz = 500;
char Buffer[BufSiz];

while(true)
{
   int Len = InFil.readsome(Buffer,BufSiz);
   // process the data in Buffer, not that on the last read the data will only
   // be Len long, not BufSiz long.  So always use Len as the
   // length of the data.
   OutFil.write(buffer,Len);
   if (Len != BufSiz)
      break;
}


let me know if you have any questuions.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Written by John Humphreys C++ Threading and the POSIX Library This article will cover the basic information that you need to know in order to make use of the POSIX threading library available for C and C++ on UNIX and most Linux systems.   [s…
  Included as part of the C++ Standard Template Library (STL) is a collection of generic containers. Each of these containers serves a different purpose and has different pros and cons. It is often difficult to decide which container to use and …
The viewer will learn how to use the return statement in functions in C++. The video will also teach the user how to pass data to a function and have the function return data back for further processing.
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.

831 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question