File handling is a crucial component of programming in the C++ language. It involves reading from or writing to files on a computer system, and can be used for data storage and retrieval. File handling is a powerful tool that can be used to store information permanently, so it’s essential for any programmer who wants to create complex programs or applications. In this blog article, we’ll discuss what file handling is and why it’s important in C++ programming. We’ll also explain how to implement file handling in your own projects.

file handling in cpp

files in c++

When we talk about files in C++, we are referring to external files that are stored on a computer system. These files can be of any type, such as text documents, images, or executable programs. In order to access and manipulate these files, we use a concept called file handling.

File handling is a collection of functions that allow us to create, open, read, write, and close files on a computer system. To use these functions, we must first include the header file in our program. Once we have done this, we can start working with files in C++.

Let’s take a look at an example of how to create a new file in C++. We will use the function fopen(), which takes two arguments: the name of the file to be created and the mode in which the file should be opened. The mode argument tells fopen() how we want to interact with the file; for example, whether we want to read from it or write to it.

In this example, we are telling fopen() that we want to create a new file called “myfile.txt” and that we want to write data to it (the “w” mode). If the file already exists, it will be overwritten by the new data; if it does not exist, it will be created. Once we have opened the file, we can start writing data to it using the function fputs().

Introduction to file handling in c++

File handling is one of the most important aspects of programming in any language. It allows you to store data in a file for later use, which can be extremely useful when working with large amounts of data. C++ has a very powerful set of file handling functions. In this article, we’ll take a look at what file handling is and how to use it in C++.

What is file handling?

File handling is the process of reading from or writing to files. This can be done in a number of ways, but the most common methods are using input/output streams or using system calls.

Input/output streams are objects that allow you to read from or write to files. They’re extremely easy to use and have a lot of functionality built in. System calls are low-level functions that allow you to directly interact with the operating system. They’re more complex than input/output streams, but they offer more control over how files are accessed.

How to use file handling in C++

There are two main ways to use file handling in C++: input/output streams and system calls. We’ll take a look at both methods so that you can decide which one is right for your needs.

Input/Output Streams

Input/output streams are the easiest way to work with files in C++. They’re part of the standard library, so you don’t need to download anything extra to use them. And they

The different types of files in c++

There are three types of files that can be handled in C++, namely text files, data files, and binary files.

Text Files: A text file is a sequence of characters organized into lines. The typical text file uses a delimiter such as a space or comma to separate each line. Data Files: A data file is a collection of information organized in groups. Each group has a specific format, which can be either fixed-length or variable-length. Binary Files: A binary file is an executable program or a library of functions.

How to create and open a file in c++

Assuming you have a text editor like Notepad or TextEdit and a C++ compiler like GCC, follow these steps to create and open a file in C++.

1. Open your text editor and create a new file.

2. Type the following code into your file:

#include
using namespace std;
int main()
{
cout<<"Hello World!";
return 0;
}

3. Save your file with a “.cpp” extension (for example, “file-name.cpp”).

4. Open the terminal and navigate to the directory where you saved your file. For example, if you saved your file on the Desktop, you would type “cd Desktop” into the terminal.

5. Type “g++ -o name-of-your-file name-of-your-file.cpp”. This will compile your code and produce an executable file with the name you specified. In our example, we would type “g++ -o hello hello.cpp”.
If there are no errors in your code, this step will produce a new file in the same directory as your “.cpp” file called “hello” (or whatever you named it). This is your executable file that you can run to see the output of your program.

6. To run your program, type “./name-of-your-file”.

Also Read This :- polymorphism in c++

How to read and write to a file in c++

In order to read from or write to a file in C++, you will need to use the ifstream and ofstream classes respectively. These classes provide an interface for reading from and writing to files.

To use these classes, you first need to include the appropriate header file:

#include

Once you have included the header file, you can create an instance of an ifstream or ofstream object. To open a file, you need to use the open() member function of the ifstream or ofstream object. This function takes a string containing the name of the file as its argument. For example, to open a file named “myfile.txt” for reading, you would do the following:

ifstream myFile;
myFile.open(“myfile.txt”);

If the open() member function succeeds, it will return true. Otherwise, it will return false and set the fail bit for the stream. You can check whether the fail bit is set by calling the stream’s fail() member function. If fail() returns true, you should not attempt to read from or write to the stream.

Once you have opened a file, you can read from it using the ifstream object’s getline() member function. getline() takes two arguments: a character array (or string) into which it will store what it reads from the file, and an integer specifying the maximum number of characters that

How to close a file in c++

When you are finished writing to or reading from a file, you can close it using the close() function. This function is declared in the fstream header.

The prototype of the close() function is:

void close();

You can use the close() member function with ifstream and ofstream objects. Once a file is closed, you cannot read from or write to it anymore. Trying to read from or write to a closed file will result in an error.

File handling example in c++

When it comes to file handling in C++, there is a lot to know. But don’t worry, we’re here to help. In this article, we’ll give you a detailed example of how to handle files in C++.

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main () {
  // Create a text file
  ofstream MyWriteFile("filename.txt");

  // Write to the file
  MyWriteFile << "Files can be tricky, but it is fun enough!";
 
  MyWriteFile.close();

  string myText;

  // Read from the text file
  ifstream MyReadFile("filename.txt");

  while (getline (MyReadFile, myText)) {

    cout << myText;
  }

  // Close the file
  MyReadFile.close();
}

We’ll start by creating a new file using the ofstream object. Then, we’ll write some data to the file using the << operator. Next, we’ll close the file using the close() method.

After that, we’ll open the file again using the ifstream object. This time, we’ll read the data from the file using the >> operator. Finally, we’ll close the file once again using the close() method.

And that’s all there is to it! With just a few simple steps, you can easily read and write data to files in C++.