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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
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Chapter 2
Using errno and perror for Errors
Summary
No summary available for this chapter.
Concept Check
0/5
What does errno store after a failed system call?
File descriptors
Memory addresses
Success status of operations
Error code for the last function call
How does perror function enhance error reporting?
Returns error code directly
Clears errno value
Prints error message with errno description
Logs errors to a file
In what scenario is errno not reliable?
In multithreaded environments without locks
When using standard libraries
After successful function calls
During file operations only
What is the relationship between errno and strerror?
Errno sets strerror value
Errno ignores strerror
Strerror converts errno to string
They are identical functions
Why check errno immediately after a function?
It's global and persistent
Functions update it periodically
Because it may change with subsequent calls
It resets automatically
5 questions remaining
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Basic Error Checking with Return Values
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Signals and Custom Error Handlers