// variable declaration
const int a = 13;  
const int b = 12;  
const int c = 14;  
const int d = 27;  
const int e = 26;  
const int f = 25;  
const int g = 33;  

const int a2 = 15;  
const int b2 = 2;  
const int c2 = 4;  
const int d2 = 21;  
const int e2 = 19;  
const int f2 = 5;  
const int g2 = 18;  

bool bPress = false;
bool bPress2 = false;
const int IncbuttonPin = 32;
const int DecbuttonPin = 35;
const int IncbuttonPin2 = 22;
const int DecbuttonPin2 = 23;

//Button state
int buttonPushCounter = 0;      
int IncbuttonState = 0;         
int lastIncbuttonState = 0;     
int DecbuttonState = 0;         
int lastDecbuttonState = 0;     

int buttonPushCounter2 = 0;      
int IncbuttonState2 = 0;         
int lastIncbuttonState2 = 0;     
int DecbuttonState2 = 0;         
int lastDecbuttonState2 = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(a, OUTPUT);  
  pinMode(b, OUTPUT);  
  pinMode(c, OUTPUT);  
  pinMode(d, OUTPUT);  
  pinMode(e, OUTPUT);  
  pinMode(f, OUTPUT);  
  pinMode(g, OUTPUT);  
  pinMode(a2, OUTPUT);  
  pinMode(b2, OUTPUT);  
  pinMode(c2, OUTPUT);  
  pinMode(d2, OUTPUT);  
  pinMode(e2, OUTPUT);  
  pinMode(f2, OUTPUT);  
  pinMode(g2, OUTPUT);  
  pinMode( IncbuttonPin , INPUT_PULLUP );
  pinMode( DecbuttonPin , INPUT_PULLUP );
  pinMode( IncbuttonPin2 , INPUT_PULLUP );
  pinMode( DecbuttonPin2 , INPUT_PULLUP );
  Serial.begin(9600);  
  displayDigit(buttonPushCounter);  
  displayDigit(buttonPushCounter2); 
  digitalWrite(g, HIGH);
  digitalWrite(g2, HIGH);
}

void loop() {  
   IncbuttonState = digitalRead(IncbuttonPin);
   DecbuttonState = digitalRead(DecbuttonPin);
   IncbuttonState2 = digitalRead(IncbuttonPin2);
   DecbuttonState2 = digitalRead(DecbuttonPin2);
   checkIncButtonPress();
   checkDecButtonPress();  
   checkIncButtonPress2();
   checkDecButtonPress2(); 
  if( bPress ){
    bPress = false;
     turnOff();
     displayDigit(buttonPushCounter);
  }
  if( bPress2 ){
    bPress2 = false;
     turnOff2();
     displayDigit2(buttonPushCounter2);
  }

   
}
void checkIncButtonPress()
{
  if (IncbuttonState != lastIncbuttonState) {
    
    if (IncbuttonState == LOW) {
      bPress = true;
      buttonPushCounter++;
      if( buttonPushCounter > 9) buttonPushCounter =0 ;
      Serial.println("on");      
    } else {
      Serial.println("off");
    }
    delay(50);
  }
  lastIncbuttonState = IncbuttonState;
}
void checkIncButtonPress2()
{
  if (IncbuttonState2 != lastIncbuttonState2) {
    
    if (IncbuttonState2 == LOW) {
      bPress2 = true;
      buttonPushCounter2++;
      if( buttonPushCounter2 > 9) buttonPushCounter2 =0 ;
      Serial.println("on");      
    } else {
      
      Serial.println("off");
    }
    delay(50);
  }
  lastIncbuttonState2 = IncbuttonState2;
}
void checkDecButtonPress()
{
   
  if (DecbuttonState != lastDecbuttonState) {
    if (DecbuttonState == LOW) {
      bPress = true;
      buttonPushCounter--;
      if( buttonPushCounter < 0) buttonPushCounter =9 ;
      Serial.println("on");      
    } else {
      Serial.println("off");
    }
    delay(50);
  }
  lastDecbuttonState = DecbuttonState;
}  
void checkDecButtonPress2()
{
   
  if (DecbuttonState2 != lastDecbuttonState2) {
    
    if (DecbuttonState2 == LOW) {
      bPress2 = true;
      buttonPushCounter2--;
      if( buttonPushCounter2 < 0) buttonPushCounter2 =9 ;
      Serial.println("on");      
    } else {
      Serial.println("off");
    }
    delay(50);
  }
  lastDecbuttonState2 = DecbuttonState2;
} 

void displayDigit(int digit)
{

 if(digit!=1 && digit != 4)
 digitalWrite(a,LOW);
 if(digit != 5 && digit != 6)
 digitalWrite(b,LOW);
 if(digit !=2)
 digitalWrite(c,LOW);
 if(digit != 1 && digit !=4 && digit !=7)
 digitalWrite(d,LOW);
 if(digit == 2 || digit ==6 || digit == 8 || digit==0)
 digitalWrite(e,LOW);
 if(digit != 1 && digit !=2 && digit!=3 && digit !=7)
 digitalWrite(f,LOW);
 if (digit!=0 && digit!=1 && digit !=7)
 digitalWrite(g,LOW);
}
void displayDigit2 (int digit2)
{
 
 if(digit2!=1 && digit2 != 4)
 digitalWrite(a2,LOW);
 if(digit2 != 5 && digit2 != 6)
 digitalWrite(b2,LOW);
 if(digit2 !=2)
 digitalWrite(c2,LOW);
 if(digit2 != 1 && digit2 !=4 && digit2 !=7)
 digitalWrite(d2,LOW);
 if(digit2 == 2 || digit2 ==6 || digit2 == 8 || digit2==0)
 digitalWrite(e2,LOW);
 if(digit2 != 1 && digit2 !=2 && digit2!=3 && digit2 !=7)
 digitalWrite(f2,LOW);
 if (digit2!=0 && digit2!=1 && digit2 !=7)
 digitalWrite(g2,LOW);
}

void turnOff()
{
  digitalWrite(a,HIGH);
  digitalWrite(b,HIGH);
  digitalWrite(c,HIGH);
  digitalWrite(d,HIGH);
  digitalWrite(e,HIGH);
  digitalWrite(f,HIGH);
  digitalWrite(g,HIGH);
}

void turnOff2()
{
  digitalWrite(a2,HIGH);
  digitalWrite(b2,HIGH);
  digitalWrite(c2,HIGH);
  digitalWrite(d2,HIGH);
  digitalWrite(e2,HIGH);
  digitalWrite(f2,HIGH);
  digitalWrite(g2,HIGH);
}