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C Fundamentals

7 Units27 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 4•Chapter 4

Real-World Project: Text File Processor

Summary

In C programming, working with files involves three steps: opening a file, performing operations, and closing it. Use a file pointer and the fopen function to open a file, such as fopen(test.txt, r) for read mode. This connects the C program to the external file. If the file does not exist, fopen returns null. Always check the file pointer after fopen to ensure the operation succeeded before proceeding.

Concept Check

0/5

What does fopen return if a file is opened in read mode and does not exist?

In C, what mode opens a file for reading only?

How should you check if fopen succeeded in C?

What is the purpose of the file pointer in C file operations?

In a Text File Processor, why use if statement after fopen?

PreviousWriting Data to Files