C mai File handling kya hota hai full deatail mai 2022

File handling in c is then fine handling operations and functions associated with it and finally the file opening modes in c so now let's begin with what is file handling in c as we all know to maintain or organize the data we use files to understand in a better way wi-fi handling is used let's consider an example of our program's input and output so what happens is that we store value in the variables and that .

 Data will be stored for time being in grammar the data will be lost whenever the program is terminated or when the system is switched off so when we want our results to be stored permanently in the secondary device we use file handling functions this means that the data is stored in a file using a program known as file handling the main objectives of the file handling are to create .

 Read write and update the files in file handling a file pointer is used to fetch and access the file in the program to perform operations on it in general a file pointer is a variable used to reference the files in the program in c programming we declare variables to hold a value right for example in ta comma b this means the variable a and b hold a value of type integer .

 Similarly in file handling and c the declaration is pi asterisk and followed by file pointer name in the following declaration file acts similar to data type which means that the file pointer variable is of the type file in file handling every file is represented with a unique file pointer variable to access the file and perform certain operations .

 The general syntax to open a file is file asterisk and followed by the file pointer name then to open a file we use the function if open and specify the file name and import which will be assigned to the file pointer variable all right now let's have a look at the file handling operations in sync to do any operations on the file we first create a file and then perform operations .

 But if the file already exists we open an existing file and perform the task and once after the creation or opening a file we read from a file or write to a file or if required we perform both the operations and the next operation we have is to move a file to the specified location if required we can move a file otherwise the last operation is to close the file so whenever we open a file it's compulsory to close the file .

 Therefore we have a set of functions to perform operations on the file so now let's see what those file handling functions are we have so many functions to handle files and see but in this session we will understand a few basic and important functions and the functions are given below as discussed before to perform any operation the first thing is to open an existing file and then perform the task .

 So basically if open function is used to open an existing file and if the file is not present in the system it will return a null the following function we have is f close whenever we open a file and complete the operations on it finally we must close a file in addition to this there is a limit to opening many files at a time so the unnecessary files must be closed when .

 The task is completed next fprintf function is similar to printer function as we all know printf function is used to print the output or we can say it is used to print the result on the console whereas fprintf function is used to write values in the specified file up next we have f scanf function which is similar to scanf function again we know that scanf function is used to take inputs from the user .

 Whereas f scan a function is used to read data or information from the specified file next we have f puts and fgts function used to write and read strings from files respectively following we have f6 function so whenever we want to write or read something on a specific part of the file we need to set the pointer to that particular position and to do this we use f6 function then we have rewind function that is..

 Used to set the current position to the start of the file that means the pointer is set to the beginning of the file and finally we have remove function hence the remove function is used to delete the file so i think you got a good understanding of all the file handling functions of c okay so let us move on to the file opening modes of c language these opening modes specify on what basis the file is opened for example .

 Suppose you want to write something on the file we open an existing file using f open function and specify the mode either to read or write the file and that is done using the following file opening modes first let's start with mode r it is used to open existing text file to read only and mode w creates and opens the file for writing but if the file already exists then it will overwrite its content .

 Next is yeti which is used to append the data at the end of the existing file append is nothing but adding up the data for writing only then rt plus where r stands for reading and t stands for text file so this mode opens the existing file to read and write next the wt plus this mode creates and opens the file for reading and writing but if the file exists it will overwrite the content or .

 Empty the content of the existing file and then eap plus we'll append the data at the end of the existing file and open it for reading and writing following we have rb where b stands for binary files so basically it is used to open an existing binary file for reading only wb this mode is used to create and open an existing binary file for writing a b mode appends at the end of the .

 Existing binary file next rbplus opens an existing binary file for reading and writing wb plus creates and opens a binary file for reading and writing and finally we have eab plus this mode is used to append to the end of the existing binary file for reading and writing so now let's have a look at the declaration let's see how the functions and modes are used in file handling .

 For the file opening operation we have the following declaration file and followed by file pointer name the pointer variable will contain the address of the file structure so as discussed before to perform any operation on the file we must open a file so for that we have the f open function assigned to a file pointer variable specified with the file name and remote so in this example the file is open to .

 Perform the write operation the following declaration is based on a reading of file therefore if scanf function is used to read from a file we can also use the f gets function next write a file so first we open an existing file and specify the file name and the mode w that is the right mode the fprintf function is followed to write data on a specified file .

 Finally after performing the operations on the file we must close the file and to close the file we use fclose function the function parameter is the pointer name now let us understand this operation using a simple program if getting your learning started is half the battle what if you could do that for free visit skill up by simply learn click on the link in the description to know .