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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 is the HTML content for Rich Text Editor based on your requirements: ```html <h1>Rich Text Editor</h1> <h2>Function Parameters in C</h2> <p>Functions in C can receive information via parameters. These parameters work as variables within the function. They are specified within the parentheses, after the function name. A function can receive multiple parameters, which should be separated by commas.</p> <h3>Syntax</h3> <pre> data_type functionName(parameter1, parameter2, parameter3) { // code to be executed } </pre> <p>The example below demonstrates a function that takes a character string as a parameter. Here, we pass a name to the function which then prints "Hello" followed by the provided name.<p> <h3>Example</h3> <pre> void greetFunction(char studentName[]) { printf("Hello %s\n", studentName); } int main() { greetFunction("Liam"); greetFunction("Jenny"); greetFunction("Anja"); return 0; } // Outputs: Hello Liam, Hello Jenny, Hello Anja </pre> <p>The passed parameter in this instance is referred to as an argument. In this case, 'studentName' is the parameter, and 'Liam', 'Jenny' and 'Anja' are arguments.</p> <h3>Multiple Parameters</h3> <p>Functions can also receive multiple parameters, demonstrated in the example below.</p> <h3>Example</h3> <pre> void greetFunction(char studentName[], int studentAge) { printf("Hello %s. You are %d years old.\n", studentName, studentAge); } int main() { greetFunction("Liam", 3); greetFunction("Jenny", 14); greetFunction("Anja", 30); return 0; } // Outputs: Hello Liam. You are 3 years old, // Hello Jenny. You are 14 years old, Hello Anja. You are 30 years old. </pre> <p>It's important to note that the function call must contain the same number of arguments as parameters, and these must be in the same order.</p> <h2>Pass Arrays as Function Parameters</h2> <p>Arrays can also be passed to a function.</p> <h3>Example</h3> <pre> void myFunction(int studentNumbers[5]) { for (int i = 0; i < 5; i++) { printf("%d\n", studentNumbers[i]); } } int main() { int studentNumbers[5] = {10, 20, 30, 40, 50}; myFunction(studentNumbers); return 0; } // Outputs: 10, 20, 30, 40, 50 </pre> <p>Here, the function 'myFunction' receives an array 'studentNumbers[5]', and iterates through its elements with a for loop. When calling the function inside main(), we pass the array 'studentNumbers', which prints the array elements. When passing the array as an argument, you only need to use the name of the array. However, the full array declaration is needed inside the function parameter.</p> <h2>Return Values</h2> <p>The keyword 'void', used in previous examples, means the function does not return a value. If you wish a function to return a value, you can use a data type (such as int or float etc.) instead of void, and use the return keyword inside the function.</p> <h3>Example</h3> <pre> int myFunction(int x) { return 5 + x; } int main() { printf("Result is: %d", myFunction(3)); return 0; } // Outputs 8 (5 + 3) </pre> <p>The result of the function can also be stored in a variable:</p> <h3>Example</h3> <pre> int myFunction(int x, int y) { return x + y; } int main() { int outcome = myFunction(5, 3); printf("Result is = %d", outcome); return 0; } // Outputs 8 (5 + 3) </pre> <h3>Real-Life Example</h3> <p>We can demonstrate the use of functions with a real-life example. Consider a program that converts a value from fahrenheit to celsius:</p> <h3>Example</h3> <pre> // Function to convert Fahrenheit to Celsius float toCelsius(float fahrenheit) { return (5.0 / 9.0) * (fahrenheit - 32.0); } int main() { // Set a fahrenheit value float f_value = 98.8; // Call the function with the fahrenheit value float outcome = toCelsius(f_value); // Print the fahrenheit value printf("Fahrenheit: %.2f\n", f_value); // Print the result printf("Convert Fahrenheit to Celsius: %.2f\n", outcome); return 0; } // Outputs: Fahrenheit: 98.8, Convert Fahrenheit to Celsius: 37.11 </pre> ```