Error Handling
C Programming Tutorial : Error Handling
Last updated
C Programming Tutorial : Error Handling
Last updated
Welcome to the Codes With Pankaj "Error Handling in C Programming" tutorial! This tutorial will guide you through the concepts and best practices of error handling in C.
Table of Contents
Error handling is essential in programming to gracefully handle unexpected situations and failures. In C programming, error handling ensures that programs can detect and recover from errors efficiently.
Return Values
Functions in C often return special values to indicate errors. It's common for functions to return -1
or NULL
to signal an error condition.
Example:
Functions returning error codes can be checked in the calling function to handle errors appropriately. Conditional statements are used to check for error conditions and take corrective actions.
Example:
The errno
variable is used to indicate error conditions in C programs. It's a global variable defined in the <errno.h>
header and is set by various library functions upon encountering errors.
Example:
Custom error handling techniques involve defining and using custom error codes, error structures, or callback functions to handle errors in a more structured manner.
Example:
Use Meaningful Error Codes
Define meaningful error codes to clearly indicate different types of errors.
Consistent Error Handling
Adopt a consistent approach to error handling throughout the program to maintain code readability and maintainability.
Clear Error Messages
Provide clear and informative error messages to aid debugging and troubleshooting.
Ignoring Errors
Ignoring errors can lead to unexpected behavior or program crashes. Always check for errors and handle them appropriately.
Improper Error Propagation
Ensure proper propagation of errors across functions to maintain error transparency and enable effective error handling.
Try these exercises to practice error handling in C:
Exercise 1: Write a function to open a file and return an appropriate error code if the file does not exist.
Exercise 2: Implement a custom error handling mechanism using error codes and error messages.
Exercise 3: Modify a function to return an error code when an invalid input parameter is detected.
Exercise 4: Write a program to divide two numbers and handle the division by zero error gracefully.
Exercise 5: Extend the custom error handling mechanism to include error logging to a file.
We hope this tutorial has helped you understand error handling in C programming. Practice with the exercises provided to reinforce your understanding. Happy coding!
For more tutorials, visit .