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Begin Your Journey with C

To initiate your learning in C, you require the following:

  • A text editor for crafting C code
  • A compiler like GCC to convert the C code into a machine-understandable language

There are various text editors and compilers to select from. For this tutorial, an IDE (Integrated Development Environment) will be used by us.

Setting up the C IDE

An IDE is a software suite that consolidates the basic tools needed to write and test the code. Popular IDEs include Code::Blocks, Eclipse, and Visual Studio which are all free to use and facilitate both the editing and debugging of C code.

Note: Although web-based IDEs can be used, they typically have more limitations compared to their desktop counterparts.

We recommend starting with Code::Blocks. The latest version can be downloaded from here.

Let's Start with C

Create your first C file by following the steps below:

  1. Open Codeblocks
  2. Go to File > New > Empty File
  3. Write the following C code and save the file as myfirstprogram.c:
#include <stdio.h>, int main() { printf("Welcome to Fynd Academy!"); return 0;}

The above code might seem incomprehensible for now, we'll break it down in later chapters. For now, concentrate on running the code.

Executing Your Code

After writing the code, it's time to run it. In Codeblocks, navigate to Build > Build and Run. Your result will look something like this:

Welcome to Fynd Academy!

Great job! You've just written and executed your first C program.

Your C Learning Journey with Fynd Academy

Learning C with Fynd Academy is facilitated by our "Practice it Yourself" tool. It concurrently illustrates the code and the outcome, simplifying every new part you learn:

#include <stdio.h>int main() { printf("Welcome to Fynd Academy!"); return 0;} Welcome to Fynd Academy!

Practice it Yourself ยป

Fynd Academy Pathfinder

Track your progress as you embark on your learning journey. Best of all, it's complimentary!

<p><strong>C Files</strong></p><h2>Handling Files</h2><p>In C, a file can be created, opened, written to, and read from by declaring a pointer of type FILE and using the fopen() function:</p><pre><code>FILE *filePtr = fopen(filename, mode);</code></pre><p>FILE is essentially of data type, and to operate with it, pointer variable has to be created (filePtr). At this stage, the meaning of this line isn't important. It's just a necessity when operations are to be conducted on files. To actually open a file, the fopen() function is used, which takes in two parameters:</p> <table> <tr> <th>Parameter</th> <th>Description</th> </tr> <tr> <td>filename</td> <td>The actual file that you want to open (or create), like filename.txt</td> </tr> <tr> <td>mode</td> <td> A single character that represents the operation to be performed on the file (read, write or append): <ul> <li>w - Writes to a file</li> <li>a - Appends new data to a file</li> <li>r - Reads from a file</li> </ul> </td> </tr> </table> <h2>Creating a File</h2><p>To create a file, the 'w' mode is used within the fopen() function. The 'w' mode writes to a file. However, if the file doesn't exist, a new one will be created:</p><pre><code>FILE *filePtr;// Create a file filePtr = fopen("filename.txt", "w"); // Close the file fclose(filePtr);</code></pre><p><em>Note: The file is created in the same directory as your other C files, unless specified otherwise.</em></p><p><em>Tip: To create a file in a specific folder, simply provide its absolute path:</em></p><pre><code>filePtr = fopen("C:\\directoryname\\filename.txt", "w");</code></pre> <h2>Closing a File</h2><p>Did you notice the fclose() function in our example above? This function closes the file when it is not in use. This practice is recommended because it ensures:</p><ul><li>Changes are saved properly</li><li>Other programs can access the file (if required)</li><li>Unnecessary memory space is cleared up</li></ul><p>In upcoming chapters, we will explore how to write content to a file and read from it.</p> <h4>Pathfinder</h4><p>Monitor your progress - it's complimentary!</p>