#include <U8g2lib.
h>
U8G2_ST7920_128X64_F_SW_SPI u8g2(U8G2_R0, /* clock=*/ 18, /*
data=*/ 23, /* CS=*/ 5, /* reset=*/ 4);
void setup() {
u8g2.begin();
void loop() {
u8g2.clearBuffer();
u8g2.setFont(u8g2_font_ncenB14_tr);
u8g2.drawStr(10, 30, "Hello!");
u8g2.sendBuffer();
delay(1000);
Another one
#include <U8g2lib.h>
// Initialize LCD using SPI mode
U8G2_ST7920_128X64_F_SW_SPI u8g2(U8G2_R0, /* clock=*/ 18, /*
data=*/ 23, /* CS=*/ 5, /* reset=*/ 4);
void setup() {
u8g2.begin();
}
void loop() {
u8g2.clearBuffer();
u8g2.setFont(u8g2_font_ncenB14_tr);
u8g2.drawStr(10, 30, "Hello, Michelle!");
u8g2.sendBuffer();
delay(2000);
Graphic#include <U8g2lib.h>
#include <Wire.h>
U8G2_ST7920_128X64_F_SW_SPI u8g2(U8G2_R0, /* clock=*/ 18, /*
data=*/ 23, /* CS=*/ 5, /* reset=*/ 4);
bool eyesOpen = true;
void drawSmileyFace(bool eyesOpen) {
u8g2.drawCircle(64, 32, 15, U8G2_DRAW_ALL); // Face
if (eyesOpen) {
u8g2.drawCircle(58, 26, 2, U8G2_DRAW_ALL); // Left Eye Open
u8g2.drawCircle(70, 26, 2, U8G2_DRAW_ALL); // Right Eye Open
} else {
u8g2.drawLine(55, 26, 61, 26); // Left Eye Closed
u8g2.drawLine(67, 26, 73, 26); // Right Eye Closed
u8g2.drawArc(64, 32, 8, 0, 180, U8G2_DRAW_ALL); // Smile
void setup() {
u8g2.begin();
}
void loop() {
u8g2.clearBuffer();
drawSmileyFace(eyesOpen);
eyesOpen = !eyesOpen; // Toggle eye state
u8g2.sendBuffer();
delay(1000);
Simple coding
#include <iostream> // Adds the ability to display text
using namespace std; // Allows us to use standard commands
int main() { // The starting point of the program
cout << "Hello, Michelle! Welcome to coding!" << endl; // Prints text
on the screen
return 0; // Ends the program
}#include <iostream> // Allows input and output
using namespace std; // Simplifies code writing
int main() {
string name; // Creates a variable to store the name
cout << "What is your name? "; // Asks for the name
cin >> name; // Takes input from the user
cout << "Hello, " << name << "! Welcome to coding!" << endl; //
Displays a personalized message
return 0;
Asks your name
C++
## **📌 Introduction to C++ for Beginners**
### **🔹 What is C++?**
C++ is a **powerful programming language**
used for **games, applications, software,
robotics, and microcontrollers** like ESP32. It is
one of the most widely used programming
languages in the world.
🔹 **Created by:** Bjarne Stroustrup in 1983
🔹 **Used for:** Games, AI, Operating Systems,
Embedded Systems (like ESP32)
🔹 **Popular in:** Microsoft, Google, Game
Development, Robotics
---
## **📌 Why Learn C++?**
✅ **Fast & Powerful** – Used for high-
performance applications
✅ **Used in Microcontrollers** – Helps program
ESP32, Arduino, and robotics
✅ **Game Development** – Used in Unreal Engine
& game programming
✅ **Foundation for Other Languages** – Learning
C++ helps you learn Python, Java, and more!
---
## **📌 Basic Structure of a C++ Program**
Every C++ program has **three main parts**:
1️⃣ **Preprocessor Directives** (`#include`) –
Adds built-in features
2️⃣ **Main Function** (`int main()`) – The starting
point of the program
3️⃣ **Statements** (`cout`, `cin`) – Instructions
for the computer
---
### **📌 Example 1: Your First C++ Program**
Let’s write a simple **"Hello, World!"** program:
```cpp
#include <iostream> // Adds input and output
functions
using namespace std; // Simplifies code writing
int main() { // The main function (starting point)
cout << "Hello, Michelle! Welcome to C++!"
<< endl; // Prints text on the screen
return 0; // Ends the program
}
```
### **🔹 Explanation**
- `#include <iostream>` → Allows us to use
**input & output** commands.
- `using namespace std;` → Makes coding
**easier** by removing the need for `std::`.
- `int main() { ... }` → This is the **main
function** (where the program starts).
- `cout << "Hello, Michelle!";` → Displays text on
the screen.
- `return 0;` → Ends the program.
---
### **📌 Example 2: Asking for Your Name**
```cpp
#include <iostream>
using namespace std;
int main() {
string name; // Creates a variable to store the
name
cout << "What is your name? ";
cin >> name; // Takes user input
cout << "Nice to meet you, " << name << "!"
<< endl; // Outputs the name
return 0;
}
```
### **🔹 What’s New?**
- `string name;` → Stores your name.
- `cin >> name;` → Allows user **input** (you
type your name).
- `cout << "Nice to meet you!";` → Displays the
greeting.
---
### **📌 Example 3: Simple Math (Addition)**
```cpp
#include <iostream>
using namespace std;
int main() {
int num1, num2, sum; // Creates variables
cout << "Enter first number: ";
cin >> num1; // Takes first number
cout << "Enter second number: ";
cin >> num2; // Takes second number
sum = num1 + num2; // Adds the numbers
cout << "The sum is: " << sum << endl; //
Displays result
return 0;
}
```
### **🔹 What’s Happening?**
- `int num1, num2, sum;` → Creates **integer
variables**.
- `cin >> num1;` → Takes a number from the user.
- `sum = num1 + num2;` → Adds the numbers.
- `cout << sum;` → Prints the result.
---
## **📌 What’s Next?**
Would you like to learn **loops, conditions, or
more about microcontrollers (ESP32)?** 🚀😊
