How to display on my number of free parking on 4 digit 7segment using IR obstacl

Projects Programming
18

So here it is , for the meanwhile i've considered only 3 sensors. so Number of free parking initially should be 3 and decrement as car is sense in each slot.

int LEDA11 = 50;
int LEDA12 = 51;

int LEDA21 = 52;
int LEDA22 = 53;

int LEDA31 = 42;
int LEDA32 = 32;

int pinA = 2;  //For displaying segment "a"
int pinB = 3;  //For displaying segment "b"
int pinC = 4;  //For displaying segment "c"
int pinD = 5;  //For displaying segment "d"
int pinE = 6;  //For displaying segment "e"
int pinF = 8;  //For displaying segment "f"
int pinG = 9;  //For displaying segment "g"

int sensorA1 = 10; 
int sensorA2 = 11 ;
int sensorA3 = 12 ;

int isObstacle = HIGH;  // HIGH MEANS NO VEHICLE
byte parkingSpacesFree;

void setup() {
  // put your setup code here, to run once:

parkingSpacesFree = 3;

 pinMode(pinA, OUTPUT);  //A
  pinMode(pinB, OUTPUT);  //B
  pinMode(pinC, OUTPUT);  //C
  pinMode(pinD, OUTPUT);  //D
  pinMode(pinE, OUTPUT);  //E
  pinMode(pinF, OUTPUT);  //F
  pinMode(pinG, OUTPUT);  //G

  pinMode(sensorA1, INPUT);
  pinMode(sensorA2, INPUT);
  pinMode(sensorA3, INPUT);

  pinMode(LEDA11, OUTPUT); //RED LED indicating No car in parking slot
  pinMode(LEDA12, OUTPUT); //GREEN LED indicating Car in parking slot

  pinMode(LEDA21, OUTPUT);
  pinMode(LEDA22, OUTPUT);

  pinMode(LEDA31, OUTPUT);
  pinMode(LEDA32, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
isObstacle = digitalRead(sensorA1);
  if (isObstacle == LOW)
  {
    Serial.println("OBSTACLE!!, OBSTACLE!!");
    digitalWrite(LEDA11, HIGH);
    parkingSpacesFree --;
  }
  else
  {
    Serial.println("clear");
    digitalWrite(LEDA11,LOW);
    parkingSpacesFree ++;
  }
  if (isObstacle == LOW)
  {
    Serial.println("OBSTACLE!!, OBSTACLE!!");
    digitalWrite(LEDA12, LOW);
   parkingSpacesFree --;
  ;
  }
  else
  {
    Serial.println("clear");
    digitalWrite(LEDA12,HIGH);
    parkingSpacesFree ++;
  }


/////////////////////////////////////

 isObstacle = digitalRead(sensorA2);
  if (isObstacle == LOW)
  {
    Serial.println("OBSTACLE!!, OBSTACLE!!");
    digitalWrite(LEDA21, HIGH);
    parkingSpacesFree --;
  }
  else
  {
    Serial.println("clear");
    digitalWrite(LEDA21,LOW);
    parkingSpacesFree ++;
  }
  if (isObstacle == LOW)
  {
    Serial.println("OBSTACLE!!, OBSTACLE!!");
    digitalWrite(LEDA22, LOW);
   parkingSpacesFree --;
  }
  else
  {
    Serial.println("clear");
    digitalWrite(LEDA22,HIGH);
   parkingSpacesFree ++;
  }


/////////////////////////////////////
 isObstacle = digitalRead(sensorA3);
  if (isObstacle == LOW)
  {
    Serial.println("OBSTACLE!!, OBSTACLE!!");
    digitalWrite(LEDA31, HIGH);
    parkingSpacesFree --;
  }
  else
  {
    Serial.println("clear");
    digitalWrite(LEDA31,LOW);
    parkingSpacesFree ++;
  }
  if (isObstacle == LOW)
  {
    Serial.println("OBSTACLE!!, OBSTACLE!!");
    digitalWrite(LEDA32, LOW);
    parkingSpacesFree --;
  }
  else
  {
    Serial.println("clear");
    digitalWrite(LEDA32,HIGH);
  parkingSpacesFree --;
  }
 if ( parkingSpacesFree ==3)
 { 
   digitalWrite(pinA, HIGH);   
  digitalWrite(pinB, HIGH);   
  digitalWrite(pinC, HIGH);   
  digitalWrite(pinD, HIGH);   
  digitalWrite(pinE, LOW);   
  digitalWrite(pinF, LOW);   
  digitalWrite(pinG, HIGH);
  }
else if (parkingSpacesFree == 0)

{
   digitalWrite(pinA, HIGH);   
  digitalWrite(pinB, HIGH);   
  digitalWrite(pinC, HIGH);   
  digitalWrite(pinD, HIGH);   
  digitalWrite(pinE, HIGH);   
  digitalWrite(pinF, HIGH);   
  digitalWrite(pinG, LOW); 

}
else if (parkingSpacesFree == 1)
{
   digitalWrite(pinA, LOW);   
  digitalWrite(pinB, LOW);   
  digitalWrite(pinC, LOW);   
  digitalWrite(pinD, LOW);   
  digitalWrite(pinE, HIGH);   
  digitalWrite(pinF, HIGH);   
  digitalWrite(pinG, LOW);
}
else if (parkingSpacesFree ==2)
{
  digitalWrite(pinA, HIGH);   
  digitalWrite(pinB, HIGH);   
  digitalWrite(pinC, LOW);   
  digitalWrite(pinD, HIGH);   
  digitalWrite(pinE, HIGH);   
  digitalWrite(pinF, LOW);   
  digitalWrite(pinG, HIGH); 
}


}