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Learn C Programming

Learn C Programming

By : Jeff Szuhay
4.7 (6)
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Learn C Programming

Learn C Programming

4.7 (6)
By: Jeff Szuhay

Overview of this book

The foundation for many modern programming languages such as C++, C#, JavaScript, and Go, C is widely used as a system programming language as well as for embedded systems and high-performance computing. With this book, you'll be able to get up to speed with C in no time. The book takes you through basic programming concepts and shows you how to implement them in the C programming language. Throughout the book, you’ll create and run programs that demonstrate essential C concepts, such as program structure with functions, control structures such as loops and conditional statements, and complex data structures. As you make progress, you’ll get to grips with in-code documentation, testing, and validation methods. This new edition expands upon the use of enumerations, arrays, and additional C features, and provides two working programs based on the code used in the book. What's more, this book uses the method of intentional failure, where you'll develop a working program and then purposely break it to see what happens, thereby learning how to recognize possible mistakes when they happen. By the end of this C programming book, you’ll have developed basic programming skills in C that can be easily applied to other programming languages and have gained a solid foundation for you to build on as a programmer.
Table of Contents (38 chapters)
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1
Part 1: C Fundamentals
10
Part 2: Complex Data Types
19
Part 3: Memory Manipulation
22
Part 4: Input and Output
28
Part 5: Building Blocks for Larger Programs

Chapter 23: Using File Input and File Output

In the previous chapter, we introduced many basic file concepts as well as most of the file manipulation functions. We also demonstrated a simple way to open and close files.

In this chapter, we will put that knowledge to better use by developing programs to read and write to/from a sequential file. Our goal in this chapter is to accept input from a console or a file, sort each line in a file, and then write out the result, either to a console or to a file. We will find that there are several subtleties that we will need to address; we will also be using nearly every C skill we have learned so far.

The following topics will be covered in this chapter:

  • Creating a template program to process filenames given on the command line
  • Creating a program to accept input from either stdin or a file and write output to either stdout or a file
  • Creating a function to trim input from fgets()
  • Creating...

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