Write File in C

In C, you can use the standard library function fopen() to open a file, and then use the function fwrite() or fprintf() to write to the file.
Here is an example of how to write to a file called "sample.txt" using the fprintf() function:

This program demonstrates how to write to a file in C using the fopen() and fprintf() functions.

The program starts by including the stdio.h header file, which contains the declarations of the functions used in the program.
In the main function, the program declares a file pointer "fp". The fopen() function is used to open the file "sample.txt" in append mode and assigns the returned pointer to the file pointer "fp".
The append mode is used to add new data to the end of the file without truncating it, unlike the write mode that truncates the file to 0 bytes and overwrites it with the new data.
The fprintf() function is used to write the given string "Stanley" to the file. The fprintf() function takes two arguments: a pointer to the file and a format string.
Once all the data is written to the file, the program closes the file using the fclose() function and returns 0 to indicate that the program has executed successfully.
It's worth noting that if the file does not exist, the fopen function will create it.

Source Code

//Write a File
#include<stdio.h>
int main()
{
   FILE *fp;
   //fp=fopen("sample.txt","w");
   fp=fopen("sample.txt","a");
   fprintf(fp,"Stanley\n");
   fclose(fp);
    return 0;
}

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Output

Before Write File

C Program - Write File

After Write File

C Program - Write File

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Write File in C

Source Code

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