Consider the following C code snippet:

What is the primary purpose of the feof(FILE *stream) function used in this code?

Correct option is C

The feof(FILE *stream) function is used in this code to check whether the end-of-file (EOF) indicator for the file stream (file) has been set. Its primary purpose is to confirm that the program has reached the end of the file after attempting to read the file using fgetc.
1. How It Works in the Code:
· The while loop reads the file character by character using fgetc until EOF is encountered.
· After exiting the loop, feof checks if the end of the file was successfully reached or if an error occurred during reading.
2. Purpose of feof:
· If feof(file) returns a non-zero value, it means the end of the file was reached successfully.
· Otherwise, it indicates an error occurred during the reading process.
Important Key Points:
1. What feof() Does:
· Checks if the EOF flag is set for the file stream.
· Does not perform any reading or writing operations.
2. When to Use feof(): To verify if EOF was reached after attempting to read a file.
3. How It Differs from Other Functions:
· fgetc: Reads the next character from the file.
· fclose: Closes the file.
· ferror: Checks for errors during file I/O operations.
Knowledge Booster:
· File Handling in C: Use feof and ferror together for robust error handling when reading or writing files.