#include "SevSeg.h"
SevSeg sevseg; 
bool test = true;
int a,b,c,d = 0;

void setup() {
  pinMode(A4, INPUT_PULLUP);
  pinMode(A0, INPUT_PULLUP);
  pinMode(A1, INPUT_PULLUP);
  pinMode(A2, INPUT_PULLUP);
  pinMode(A3, INPUT_PULLUP);
  Serial.begin(9600);
  byte numDigits = 4;
  byte digitPins[] = {9,10,11,12};
  byte segmentPins[] = {2, 3, 4, 5, 6, 7, 8};
  bool resistorsOnSegments = false; 
  byte hardwareConfig = COMMON_ANODE; 
  bool updateWithDelays = false; 
  bool leadingZeros = false; 
  bool disableDecPoint = true; 
  sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments,
  updateWithDelays, leadingZeros, disableDecPoint);
  sevseg.setBrightness(90);
}

void loop() {

  if (digitalRead(A4) == LOW)
{
  a = 0;
  b = 0; 
  c = 0;
  d = 0;
    sevseg.setNumber(nasobic());

}

if(digitalRead(A0) == LOW && test){
test = false;
  if( a<9){
  a++;
  }
  sevseg.setNumber(nasobic());
}
else if(digitalRead(A1) == LOW && test)
{
 test=false;
  if( b<9){
  b++;
  }
  sevseg.setNumber(nasobic());
}

else if(digitalRead(A2) == LOW && test)
{
 test=false;
  if( c<9){
  c++;
  }
  Serial.println(c);
  sevseg.setNumber(nasobic());
}

else if(digitalRead(A3) == LOW && test)
{
 test=false;
  if( d<9){
  d++;
  }
  sevseg.setNumber(nasobic());
}

else if(digitalRead(A0) == HIGH && digitalRead(A1) == HIGH && digitalRead(A2) == HIGH
  && digitalRead(A3) == HIGH)
{
test = true;

}

sevseg.refreshDisplay();
}

int nasobic(){
return a*1000+b*100+c*10+d;
}

//https://github.com/DeanIsMe/SevSeg