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C Academy · Lesson

File Error Handling

Implement error-checking mechanisms to prevent file operation failures.

1

File Error Handling

Error handling ensures that file operations are performed safely and correctly, preventing crashes and data loss.

In this lesson, you will learn:

  • How to check if a file opened successfully.
  • How to detect read and write errors.
  • How to use error handling functions like ferror() and perror().
File Error Handling — illustration 1

2

Checking if a File Opened Successfully

Always check if fopen() returns NULL, which indicates a failure.

Example:

FILE *filePtr = fopen("data.txt", "r"); if (filePtr == NULL) { printf("Error: File not found!\n"); }

All lessons in this course

  1. Introduction to File Handling
  2. Working with Binary Files
  3. File Error Handling
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