Read write to same file

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by: John Flynn | last post by:

hi, having problems reading from and writing back to the same file. basically, i want to read lines of text from a file and reverse them and write them back to the same file.. it has to replace the text its reversing eg.

C / C++

13344

Read text file into std::string.

by: Jason Heyes | last post by:

Does this function need to call eof after the while-loop to be correct? bool read_file(std::string name, std::string &s) { std::ifstream in(name.c_str()); if (!in.is_open()) return false; char c; std::string str;

C / C++

6774

Simultaneously Write to and Read from the same file

by: cnu | last post by:

My program generates a log file for every event that happens in the program. So, I open the file and keep it open till the end. This is how I open the file for writing: <CODE> public CLogHandler() { this.m_fsLog = new FileStream(strTodaysLogFile, System.IO.FileMode.Append, System.IO.FileAccess.Write, System.IO.FileShare.Read); this.m_swLog = new StreamWriter(this.m_fsLog);

.NET Framework

4316

File Read/Write

by: Magix | last post by:

Hi, I have these string data: str_data1, str_data2, str_data3, which capture some value after a routine process A. Then I would like to write (append) these 3 string values into a text file each time after routine process A, the text file is named "mytext.dat" in following format with "#####" as separator. The maximum entries of them is 5. When reaching the fifth entry, it will delete the very first entry.

C / C++

6802

Read and write to ascii file at the same time?

by: VM | last post by:

Is it possible to open an ascii file, read the first 499 lines, overwrite line 500 with the new string, and close the file? All the lines before and after line 500 will be untouched. Thanks.

C# / C Sharp

1876

Wite and Read to same file ERROR ?

by: Sharon | last post by:

I'm using StreamWriter to write to file and at the same time I'm using the StreamReader to read from the same file. Doing that cause an exception when I'm trying to create the StreamReader when the file is already opened fro writing by the StreamWriter. How can I write and read at the same time to the same file? -- Thanks Sharon G.

C# / C Sharp

5125

Read and Write Sector

by: Sumana | last post by:

Hi All, We developed our project on VC++.Net console application to create image of disk and to write the image We are having problem with reading and writing the sector beyond 6GB Disk or Partition we are using ReadFile , WriteFile and setFilePointerEx to read and write the sectors and we are reading/writing 102400 sectors together, even we have reduced the sectors still it is not able to read or write, our program is working fine...

.NET Framework

11538

Read only last line-

by: RyanS09 | last post by:

Hello- I am trying to write a snippet which will open a text file with an integer on each line. I would like to read the last integer in the file. I am currently using: file = fopen("f.txt", "r+"); fseek(file, -2, SEEK_END); fscanf(file, "%d", &c); this works fine if the integer is only a single character. When I get into larger numbers though (e.g. 502) it only reads in the 2. Is there

C / C++

18967

File read and writing in binary mode...

by: nicolasg | last post by:

Hi, I'm trying to open a file (any file) in binary mode and save it inside a new text file. After that I want to read the source from the text file and save it back to the disk with its original form. The problem is tha the binary source that I extract from the text file seems to be diferent from the source I saved. Here is my code: 1) handle=file('image.gif','rb')

Python

3933

Problem mixing read and write on io fstream

by: Sachin Garg | last post by:

I have a program which opens a fstream in binary input+output mode, creating the file if it doesn't exists. But writing doesn't works after reading, it must be something obvious that I am not aware of. f.open(filename,ios::in | ios::out | ios::binary | ios::trunc) The program flow is 1) write some data 2) read the data

C / C++

9793

What is ONU?

by: marktang | last post by:

ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...

General

9642

Changing the language in Windows 10

by: Hystou | last post by:

Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...

Windows Server

10777

Problem With Comparison Operator <=> in G++

by: Oralloy | last post by:

Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...

C / C++

10493

Maximizing Business Potential: The Nexus of Website Design and Digital Marketing

by: jinu1996 | last post by:

In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...

Online Marketing

10526

The easy way to turn off automatic updates for Windows 10/11

by: Hystou | last post by:

Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...

Windows Server

9315

AI Job Threat for Devs

by: agi2029 | last post by:

Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...

Career Advice

7747

Access Europe - Using VBA to create a class based on a table - Wed 1 May

by: isladogs | last post by:

The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...

Microsoft Access / VBA

6951

Couldn’t get equations in html when convert word .docx file to html file in C#.

by: conductexam | last post by:

I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...

C# / C Sharp

3076

Comprehensive Guide to Website Development in Toronto: Expert Insights from BSMN Consultancy

by: bsmnconsultancy | last post by:

In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

General