7 Segment Display

/*
  This code assumes that you have connected the common cathode 7-segment display to the Arduino with the following pin connections:
  - Pin A: Arduino digital pin 2
  - Pin B: Arduino digital pin 3
  - Pin C: Arduino digital pin 4
  - Pin D: Arduino digital pin 5
  - Pin E: Arduino digital pin 6
  - Pin F: Arduino digital pin 7
  - Pin G: Arduino digital pin 8

  Once you have uploaded the code to your Arduino board, the `loop()` function will repeatedly call the `displayNumber()` function with arguments from 0 to 9, causing the 7-segment display to display the numbers in sequence with a delay of 1 second between each number. You can also call the `displayNumber()` function with a specific number as an argument to display that number on the 7-segment display.
*/

const int SEG_A = 2;
const int SEG_B = 3;
const int SEG_C = 4;
const int SEG_D = 5;
const int SEG_E = 6;
const int SEG_F = 7;
const int SEG_G = 8;

void setup() {
  pinMode(SEG_A, OUTPUT);
  pinMode(SEG_B, OUTPUT);
  pinMode(SEG_C, OUTPUT);
  pinMode(SEG_D, OUTPUT);
  pinMode(SEG_E, OUTPUT);
  pinMode(SEG_F, OUTPUT);
  pinMode(SEG_G, OUTPUT);
}

void loop() {
  displayNumber(0);
  delay(1000);

  displayNumber(1);
  delay(1000);

  displayNumber(2);
  delay(1000);

  displayNumber(3);
  delay(1000);

  displayNumber(4);
  delay(1000);

  displayNumber(5);
  delay(1000);

  displayNumber(6);
  delay(1000);

  displayNumber(7);
  delay(1000);

  displayNumber(8);
  delay(1000);

  displayNumber(9);
  delay(1000);
}

void displayNumber(int num) {
  switch (num) {
    case 0:
      digitalWrite(SEG_A, HIGH);
      digitalWrite(SEG_B, HIGH);
      digitalWrite(SEG_C, HIGH);
      digitalWrite(SEG_D, HIGH);
      digitalWrite(SEG_E, HIGH);
      digitalWrite(SEG_F, HIGH);
      digitalWrite(SEG_G, LOW);
      break;
    case 1:
      digitalWrite(SEG_A, LOW);
      digitalWrite(SEG_B, HIGH);
      digitalWrite(SEG_C, HIGH);
      digitalWrite(SEG_D, LOW);
      digitalWrite(SEG_E, LOW);
      digitalWrite(SEG_F, LOW);
      digitalWrite(SEG_G, LOW);
      break;
    case 2:
      digitalWrite(SEG_A, HIGH);
      digitalWrite(SEG_B, HIGH);
      digitalWrite(SEG_C, LOW);
      digitalWrite(SEG_D, HIGH);
      digitalWrite(SEG_E, HIGH);
      digitalWrite(SEG_F, LOW);
      digitalWrite(SEG_G, HIGH);
      break;
    case 3:
      digitalWrite(SEG_A, HIGH);
      digitalWrite(SEG_B, HIGH);
      digitalWrite(SEG_C, HIGH);
      digitalWrite(SEG_D, HIGH);
      digitalWrite(SEG_E, LOW);
      digitalWrite(SEG_F, LOW);
      digitalWrite(SEG_G, HIGH);
      break;
    case 4:
      digitalWrite(SEG_A, LOW);
      digitalWrite(SEG_B, HIGH);
      digitalWrite(SEG_C, HIGH);
      digitalWrite(SEG_D, LOW);
      digitalWrite(SEG_E, LOW);
      digitalWrite(SEG_F, HIGH);
      digitalWrite(SEG_G, HIGH);
      break;
    case 5:
      digitalWrite(SEG_A, HIGH);
      digitalWrite(SEG_B, LOW);
      digitalWrite(SEG_C, HIGH);
      digitalWrite(SEG_D, HIGH);
      digitalWrite(SEG_E, LOW);
      digitalWrite(SEG_F, HIGH);
      digitalWrite(SEG_G, HIGH);
      break;
    case 6:
      digitalWrite(SEG_A, HIGH);
      digitalWrite(SEG_B, LOW);
      digitalWrite(SEG_C, HIGH);
      digitalWrite(SEG_D, HIGH);
      digitalWrite(SEG_E, HIGH);
      digitalWrite(SEG_F, HIGH);
      digitalWrite(SEG_G, HIGH);
      break;
    case 7:
      digitalWrite(SEG_A, HIGH);
      digitalWrite(SEG_B, HIGH);
      digitalWrite(SEG_C, HIGH);
      digitalWrite(SEG_D, LOW);
      digitalWrite(SEG_E, LOW);
      digitalWrite(SEG_F, LOW);
      digitalWrite(SEG_G, LOW);
      break;
    case 8:
      digitalWrite(SEG_A, HIGH);
      digitalWrite(SEG_B, HIGH);
      digitalWrite(SEG_C, HIGH);
      digitalWrite(SEG_D, HIGH);
      digitalWrite(SEG_E, HIGH);
      digitalWrite(SEG_F, HIGH);
      digitalWrite(SEG_G, HIGH);
      break;
    case 9:
      digitalWrite(SEG_A, HIGH);
      digitalWrite(SEG_B, HIGH);
      digitalWrite(SEG_C, HIGH);
      digitalWrite(SEG_D, HIGH);
      digitalWrite(SEG_E, LOW);
      digitalWrite(SEG_F, HIGH);
      digitalWrite(SEG_G, HIGH);
      break;
    default:
      digitalWrite(SEG_A, LOW);
      digitalWrite(SEG_B, LOW);
      digitalWrite(SEG_C, LOW);
      digitalWrite(SEG_D, LOW);
      digitalWrite(SEG_E, LOW);
      digitalWrite(SEG_F, LOW);
      digitalWrite(SEG_G, LOW);
      break;