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Learn C Programming

You're reading from   Learn C Programming A beginner's guide to learning C programming the easy and disciplined way

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Product type Paperback
Published in Jun 2020
Publisher Packt
ISBN-13 9781789349917
Length 646 pages
Edition 1st Edition
Languages
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Author (1):
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Jeff Szuhay Jeff Szuhay
Author Profile Icon Jeff Szuhay
Jeff Szuhay
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Toc

Table of Contents (33) Chapters Close

Preface 1. Section 1: C Fundamentals
2. Running Hello, World! FREE CHAPTER 3. Understanding Program Structure 4. Working with Basic Data Types 5. Using Variables and Assignment 6. Exploring Operators and Expressions 7. Exploring Conditional Program Flow 8. Exploring Loops and Iteration 9. Creating and Using Enumerations 10. Section 2: Complex Data Types
11. Creating and Using Structures 12. Creating Custom Data Types with typedef 13. Working with Arrays 14. Working with Multi-Dimensional Arrays 15. Using Pointers 16. Understanding Arrays and Pointers 17. Working with Strings 18. Creating and Using More Complex Structures 19. Section 3: Memory Manipulation
20. Understanding Memory Allocation and Lifetime 21. Using Dynamic Memory Allocation 22. Section 4: Input and Output
23. Exploring Formatted Output 24. Getting Input from the Command Line 25. Exploring Formatted Input 26. Working with Files 27. Using File Input and File Output 28. Section 5: Building Blocks for Larger Programs
29. Working with Multi-File Programs 30. Understanding Scope 31. Other Books You May Enjoy Appendix

Creating, typing, and saving your first C program

Let's begin creating our Hello, world! program.

Before we begin creating files, create a directory on your computer where you will save all of the work for this book. Perhaps you will create it in your $HOME directory, or in your Documents folder. My advice is to put it somewhere in a user directory of your choice. Let's go ahead with our program:

  1. Open a Command Prompt, Terminal window, or console (depending on your OS).
  2. Navigate to $HOME or ./Documents, or wherever you chose to work from, and create a directory for the programs you'll write in this book. Do this with the following command:
    $ mkdir PacktLearnC
  3. Make that directory your current working directory with the following command:
    $ cd PacktLearnC
  4. Make a new directory for this chapter with the following command:
    $ mkdir Chapter1_HelloWorld
  1. Make that directory your current working directory with the following command:
    $ cd Chapter1_HelloWorld
  2. Picking the text editor of your choice – any will do – open the text editor either from the command line or from the GUI (depending on both your OS and your preference of which one you wish to use):
    • From the command line, you might enter $ myEditor hello1.c, or just $ myEditor, and later, you will have to save the file as hello1.c in the current working directory.
  3. Enter the following program text exactly, all while paying attention to spacing, {} versus () versus "" (these double-quotation marks are the key next to the ; and : keys) versus <>, with particular attention being paid to #, \, ., and ;:
#include <stdio.h>

int main()
{
printf( "Hello, world!\n" );
return 0;
}
  1. Save your work and exit the editor.
  2. Verify that hello1.c exists by listing the directory and verifying that its file size is not zero.

Congratulations! You have completed your first editing phase of the program development cycle.

You have been reading a chapter from
Learn C Programming
Published in: Jun 2020
Publisher: Packt
ISBN-13: 9781789349917
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