CourseGenix
Explore
Toggle theme
Sign In
C Fundamentals
7 Units
27 Lessons
Unit 1
C Functions
Introduction to C Functions
Real-World Project: Implementing a Basic Math Library
Passing Arguments to C Functions
Unit 2
Compound Data Types
Understanding Arrays in C
Working with Structures in C
Real-World Project: Creating a Student Database
Exploring Unions in C
Nested Structures and Arrays of Structures
Unit 3
Memory Management in C
Dynamic Memory Allocation Functions
Real-World Project: Dynamic Array Implementation
Basics of Pointers and Memory Allocation
Memory Management with Structures
Common Memory Errors and Debugging
Unit 4
File Handling
Opening and Closing Files in C
Reading Data from Files
Writing Data to Files
Real-World Project: Text File Processor
Unit 5
Error Handling
Basic Error Checking with Return Values
Using errno and perror for Errors
Signals and Custom Error Handlers
Real-World Project: Robust File Copy Utility
Unit 6
Miscellaneous C Concepts
Preprocessor Directives in C
Real-World Project: Configurable C Program
Typedef and Type Aliases
Unit 7
Advanced C
Bitwise Operations in C
Multi-File Programs and Linking
Real-World Project: Bitwise Encryption Tool
Unit 5
•
Chapter 1
Basic Error Checking with Return Values
Summary
No summary available for this chapter.
Concept Check
0/5
In C, what must be done with errno after a successful function call?
Never assume it remains unchanged
It is set to a success code
It is always reset to zero
It may or may not change
How does C handle errors compared to languages with exceptions?
Using error codes in errno manually
Automatic exception throwing
Error codes in errno
Return values only
What is a key characteristic of errno in multi-threaded programs?
Automatically synchronized
Globally accessible with risks
Always thread-local
Potential race conditions exist
Which function provides a human-readable message for errno values?
printf with errno
strerror function
errno itself
strerror converts errno to string
Why should you check errno immediately after a function call?
It is not automatically reset
Functions may overwrite it
It's only set on success
It resets after every call
5 questions remaining
Next
Using errno and perror for Errors