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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>Practical Examples</p> <p>These are some practical real-world project examples.</p> <h2>Variables and Data Types</h2> <p>Example</p> <p>Storing various types of student data utilizing variables:</p> <pre> // Student data int learnerID = 15; int learnerAge = 23; float learnerFee = 75.25; char learnerGrade = 'B'; // Print variables printf("Learner id: %d\n", learnerID); printf("Learner age: %d\n", learnerAge); printf("Learner fee: %.2f\n", learnerFee); printf("Learner grade: %c\n", learnerGrade); </pre> <p>Example</p> <p>Calculating rectangle area by multiplying length and width:</p> <pre> // Create integer variables int length = 4; int width = 6; int area; // Calculate the area of a rectangle area = length * width; // Print the variables printf("Length is: %d\n", length); printf("Width is: %d\n", width); printf("Rectangle area is: %d\n", area); </pre> <h2>Booleans</h2> <p>Example</p> <p>Determine if a person is eligible to vote:</p> <pre> int myAge = 25; int voting_Age = 18; printf("%d", myAge >= voting_Age); </pre> <h2>Conditions (If..Else)</h2> <p>Example</p> <p>Use if..else statements to display text based on time:</p> <pre> int time = 20; if (time < 18) { printf("Good day."); } else { printf("Good evening."); } </pre> <h2>Switch</h2> <p>Example</p> <p>Calculate and output the weekday name using the weekday number:</p> <pre> int day = 4; switch (day) { case 1: printf("Monday"); break; case 2: printf("Tuesday"); break; case 3: printf("Wednesday"); break; case 4: printf("Thursday"); break; case 5: printf("Friday"); break; case 6: printf("Saturday"); break; case 7: printf("Sunday"); break; } </pre> <p>Example</p> <p>Create a simple "countdown" program using a while loop:</p> <pre> int countdown = 3; while (countdown > 0) { printf("%d\n", countdown); countdown--; } printf("Happy New Year!!\n"); </pre> <h2>For Loops</h2> <p>Example</p> <p>Create a program that only prints even values between 0 and 10 using a for loop:</p> <pre> int i; for (i = 0; i <= 10; i = i + 2) { printf("%d\n", i); } </pre> <h2>Functions</h2> <p>Example</p> <p>Use a function to create a program that converts a value from Fahrenheit to Celsius:</p> <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 fahrenheit_value = 98.8; // Call the function with the Fahrenheit value float result = toCelsius(fahrenheit_value); // Print the Fahrenheit value printf("Fahrenheit: %.2f\n", fahrenheit_value); // Print the result printf("Fahrenheit to Celsius conversion: %.2f\n", result); return 0; } </pre> <h2>Structures</h2> <p>Example</p> <p>Use a structure to store and output different information about cars:</p> <pre> struct Car { char brand[50]; char model[50]; int year; }; int main() { struct Car car1 = {"BMW", "X5", 1999}; struct Car car2 = {"Ford", "Mustang", 1969}; struct Car car3 = {"Toyota", "Corolla", 2011}; printf("%s %s %d\n", car1.brand, car1.model, car1.year); printf("%s %s %d\n", car2.brand, car2.model, car2.year); printf("%s %s %d\n", car3.brand, car3.model, car3.year); return 0; } </pre> <h2>Memory Management</h2> <p>Example</p> <pre> struct list { int *data; // Points to where the list items are stored int numItems; // Indicates how many items are currently in the list int size; // Indicates how many items can fit in the allocated memory }; void addToList(struct list *theList, int item); ... </pre>