// 190127_Seven Segment & Push button - 'Counter'
const int a = 2;  
const int b = 3;  
const int c = 4; 
const int d = 5;  
const int e = 6; 
const int f = 7; 
const int g = 8;  

bool bPress = false;
const int buttonPin = 10;
int buttonPushCounter = 0;   
int buttonState = 0;       
int lastButtonState = 0;    

void setup() {
 
  pinMode(a, OUTPUT);  
  pinMode(b, OUTPUT);  
  pinMode(c, OUTPUT);  
  pinMode(d, OUTPUT);  
  pinMode(e, OUTPUT);  
  pinMode(f, OUTPUT);  
  pinMode(g, OUTPUT);  

  pinMode( buttonPin , INPUT_PULLUP );
  Serial.begin(9600);
  displayDigit(buttonPushCounter);
}

void loop() {

   buttonState = digitalRead(buttonPin);

  
  if (buttonState != lastButtonState) {
  
    if (buttonState == LOW) {
     
      bPress = true;
      buttonPushCounter++;
      if( buttonPushCounter > 9) buttonPushCounter =0 ;
      Serial.println("on");
    
    } else {
  
      Serial.println("off");
    }

    delay(50);
  }
 
  lastButtonState = buttonState;

  if( bPress ){
     turnOff();
     displayDigit(buttonPushCounter);
  }


}



void displayDigit(int digit)
{

 if(digit!=1 && digit != 4)
 digitalWrite(a,HIGH);

 
 if(digit != 5 && digit != 6)
 digitalWrite(b,HIGH);

 
 if(digit !=2)
 digitalWrite(c,HIGH);

 
 if(digit != 1 && digit !=4 && digit !=7)
 digitalWrite(d,HIGH);


 if(digit == 2 || digit ==6 || digit == 8 || digit==0)
 digitalWrite(e,HIGH);

 
 if(digit != 1 && digit !=2 && digit!=3 && digit !=7)
 digitalWrite(f,HIGH);

 
 if (digit!=0 && digit!=1 && digit !=7)
 digitalWrite(g,HIGH);

}


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