In this source code example, we will see how to use the fclose() function in C programming with an example.

fclose() Function Overview

fclose() is used to close a file in C. After working with a file, it's a good idea to close it. This makes sure everything is saved and frees up resources.

Source Code Example

 #include <stdio.h> int main() { // Opening a file to write something FILE *filePtr = fopen("example.txt", "w"); if (filePtr == NULL) { printf("Oops! Couldn't open the file.\n"); return 1; } // Writing a simple message to the file fprintf(filePtr, "Hi Ram! This is an example in C.\n"); // Now, let's close the file using fclose fclose(filePtr); printf("File closed successfully!\n"); return 0; } 

Output

File closed successfully! 

Explanation

What we did here:

1. We first opened a file named "example.txt" for writing.

2. We wrote a greeting message in it.

3. Then, we used fclose() to close the file.

4. We printed a message to say the file was closed.

Closing files is important. It makes sure our changes are saved and helps avoid any problems.