#include<array>
using namespace std;
#define a 5
#define b 22
#define c 25
#define d 26
#define e 27
#define f 18
#define g 33
#define dig1 17
#define dig2 19
#define dig3 21
#define dig4 32
int segments[7] = {a,b,c,d,e,f,g};
int digits[4] = {dig4,dig3,dig2,dig1};

// 2 dimentional array indicating on and off state of each segment of 7 segment display
int segMap[10][7] = {
  {1,1,1,1,1,1,0},
  {0,1,1,0,0,0,0},
  {1,1,0,1,1,0,1},
  {1,1,1,1,0,0,1},
  {0,1,1,0,0,1,1},
  {1,0,1,1,0,1,1},
  {1,0,1,1,1,1,1},
  {1,1,1,0,0,0,0},
  {1,1,1,1,1,1,1},
  {1,1,1,1,0,1,1},

  };

void ClearDigit(int digitPosition){
  digitalWrite(digits[digitPosition], LOW);
  for(auto i: segments)
    digitalWrite(segments[i], HIGH);
  digitalWrite(digits[digitPosition], HIGH);
}

void ClearDisplay(){
  for(int i = 0; i < 5; i++){
    ClearDigit(i);
  }
}

void InitPins(int pinArray[], HIGHLOW){
  int arraySize = sizeof(pinArray) / 4;
  for(int i = 0; i < arraySize; i++){
    pinMode(pinArray[i], OUTPUT);
    digitalWrite(pinArray[i], HIGHLOW)
  }
}

void DisplayDigit(int number){
  //InitPins(segments);
  for(int i = 0; i < 7; i = i +1){
    if (segMap[number][i] == 1){
      digitalWrite(segments[i], LOW);
    }
  }
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  InitPins(segments, HIGH);
  InitPins(digits, LOW);
}

void loop() {
  digitalWrite(32,HIGH);
  DisplayDigit(1);
}