// Define the GPIO pins for the segments of the 7-segment display
int a = 2;  // Segment A
int b = 3;  // Segment B
int c = 4;  // Segment C
int d = 5;  // Segment D
int e = 6;  // Segment E
int f = 7;  // Segment F
int g = 8;  // Segment G

// Define button pin
int buttonPin = 9; // Push button

// Variables
int count = 0; // Attendance count
int buttonState = 0; // Current button state
int lastButtonState = 0; // Previous button state

// 7-segment number patterns
const byte numbers[10][7] = {
  {1, 1, 1, 1, 1, 1, 0}, // 0
  {0, 1, 1, 0, 0, 0, 0}, // 1
  {1, 1, 0, 1, 1, 0, 1}, // 2
  {1, 1, 1, 1, 0, 0, 1}, // 3
  {0, 1, 1, 0, 0, 1, 1}, // 4
  {1, 0, 1, 1, 0, 1, 1}, // 5
  {1, 0, 1, 1, 1, 1, 1}, // 6
  {1, 1, 1, 0, 0, 0, 0}, // 7
  {1, 1, 1, 1, 1, 1, 1}, // 8
  {1, 1, 1, 1, 0, 1, 1}  // 9
};

// Function to display the number on the 7-segment display
void displayNumber(int num) {
  digitalWrite(a, numbers[num][0]);
  digitalWrite(b, numbers[num][1]);
  digitalWrite(c, numbers[num][2]);
  digitalWrite(d, numbers[num][3]);
  digitalWrite(e, numbers[num][4]);
  digitalWrite(f, numbers[num][5]);
  digitalWrite(g, numbers[num][6]);
}

void setup() {
  // Initialize segment pins
  pinMode(a, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);
  
  // Initialize button pin
  pinMode(buttonPin, INPUT);
  
  // Display the initial number (0)
  displayNumber(count);
}

void loop() {
  // Read button state
  buttonState = digitalRead(buttonPin);

  // Check if the button is pressed (and it's a new press)
  if (buttonState == HIGH && lastButtonState == LOW) {
    count++;
    if (count > 9) count = 0;  // Reset count to 0 after 9
    displayNumber(count);       // Update the display
  }
  
  // Save the current state as the last state
  lastButtonState = buttonState;
  
  // Small delay to avoid bouncing issues
  delay(50);
}