//YWROBOT
//Compatible with the Arduino IDE 1.0
//Library version:1.1
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display
int bpplus = 11 ;   
int bpmoins = 10 ;   
int bp = 9 ;   
//unsigned long startTime;  
//unsigned long currentTime;
//const unsigned long period = 10000;
//unsigned long temps = 0;
long previousMillis = 0;
long interval = 5000;

int x ;
int a;
/*class Opperation {
public :
  int a ;
  int getc(){
    return c ;
  }
 

  void mul (int _a );
    private : 
  int c;
  };
     void Opperation::mul (int _a );
  {
    c=_a;
  }*/

void setup()

{
   pinMode(bp,INPUT) ;    
 pinMode(bpplus,INPUT) ;    
 pinMode(bpmoins,INPUT) ;
 // startTime = millis();
 
Serial.begin(9600);

            lcd.init();             // initialize the lcd
  // Print a message to the LCD.
  lcd.backlight();

}
void bvn()
{
   
    lcd.setCursor(3,0);
  lcd.print("Bienvenue");
  lcd.setCursor(3,1);
  lcd.print("en BTS SN");
}
void valid()
{
 
    lcd.setCursor(0,0);
    lcd.print(x);
     lcd.setCursor(3,0);
  lcd.print("personnes");
   lcd.setCursor(3,1);
  lcd.print("ont valide");
lcd.init(); 
   
}


void loop()
{
    
  bvn();
  unsigned long currentMillis = millis(); // stocke la valeur courante de la fonction millis()
    if (currentMillis - previousMillis > interval) {
      previousMillis = currentMillis;
       
       valid();
    
     /* if ( bvn() =HIGH)
      {
       	valid();
      }*/
    }
/*else           // sinon
  
         // Met la sortie ledPIN au NL0 ( diode éteinte)
	valid() = HIGH;
  	
    

 /* lcd.init();                      // initialize the lcd
  // Print a message to the LCD.
  lcd.backlight();
/*
  lcd.setCursor(3,0);
  lcd.print("Bienvenue");
  lcd.setCursor(3,1);
  lcd.print("en BTS SN");
  delay(5000);*/

 
/*  lcd.setCursor(0,0);
    lcd.print(x);
     lcd.setCursor(3,0);
  lcd.print("personnes");
   lcd.setCursor(3,1);
  lcd.print("ont valide");
  //delay(5000);*/
  

   boolean etatbp = digitalRead(bp) ;
      
  if (etatbp==HIGH)
 {
   a++;
   delay(500);
 } 

  boolean etat = digitalRead(bpplus) ;
 if (etat==HIGH)
 {
   a--;
   delay(500);
 } 

   boolean ett = digitalRead(bpmoins) ;
   
 if (ett==HIGH)
 {
   x=a;
 } 
 if (a<0)
 {
   a=0;
 }
 /*while(millis() - temps < 9000){
  lcd.setCursor(0,0);
  lcd.print(x);
     lcd.setCursor(3,0);
  lcd.print("personnes");
   lcd.setCursor(3,1);
  lcd.print("ont valide");

      temps = millis();
    }*/
  /*while(millis() - temps > 10000){
      lcd.init();                      // initialize the lcd
  // Print a message to the LCD.
  lcd.backlight();
        lcd.setCursor(3,0);
  lcd.print("Bienvenue");
  lcd.setCursor(3,1);
  lcd.print("en BTS SN");
  temps = millis();
  delay(5000);

    }*/
//currentTime = millis();
   /* if (currentTime - startTime >= period)
    
  lcd.setCursor(0,0);
  lcd.print(x);
     lcd.setCursor(3,0);
  lcd.print("personnes");
   lcd.setCursor(3,1);
  lcd.print("ont valide");*/

  /*currentTime=millis();
  if((currentTime-previousTime)>=5000){
    previousTime=currentTime;
     lcd.init();                      // initialize the lcd
  // Print a message to the LCD.
  lcd.backlight();
     lcd.setCursor(3,0);
  lcd.print("Bienvenue");
  lcd.setCursor(3,1);
  lcd.print("en BTS SN");
  }
 /* */
 // delay();
    

       Serial.print("a = ");
        Serial.print(a);
    

 
}