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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!

Here's the HTML content as requested with replaced data, rephrases and the actions you listed: <h2>C Function Declaration and Definition</h2> <h3>Understanding Function Declaration and Definition</h3> <p>From the preceding modules, you now know that a function can be created and invoked as follows:</p> <div> <pre> /* Create a function */ void sampleFunction() { printf("This has been executed!"); } int primary() { sampleFunction(); /* invoke the function */ return 0; } </pre> </div> <p>Each function primarily includes two elements:</p> <ul> <li>Declaration: This includes the name of the function, its return type and parameters (if any).</li> <li>Definition: This includes the function's body or the code which needs to be executed.</li> </ul> <pre> void sampleFunction() { /* declaration within function entry point */ /* function body goes here */ } </pre> <p>To optimize the code, it's generally recommended to separate the function's declaration and definition. One common practice is to place the function declaration above the main() function while keeping the function definition below the main(). This enhances the organization and readability of the code:</p> <div> <pre> /* Function declaration */ void sampleFunction(); /* The main method */ int primary() { sampleFunction(); /* function invocation */ return 0; } /* Function definition */ void sampleFunction() { printf("This has been executed!"); } </pre> </div> <h3>Further Example</h3> <p>If we consider the example from our previous module about function parameters and return values, it would look like this:</p> <div> <pre> int sampleFunction(int a, int b) { return a + b; } int primary() { int output = sampleFunction(5, 3); printf("Output is = %d", output); return 0; } /* Outputs 8 (5 + 3) */ </pre> </div> <p>A good practice would be to write it as follows:</p> <div> <pre> /* Function declaration */ int sampleFunction(int, int); /* The main method */ int primary() { int output = sampleFunction(5, 3); /* function invocation */ printf("Output is = %d", output); return 0; } /* Function definition */ int sampleFunction(int a, int b) { return a + b; } </pre> </div> <h3>Pathfinder</h3> <p>Track your progress - it's free!</p>