int num;
int onState;
int a = 2;
int b = 3;
int c = 4;
int d = 5;
int e = 6;
int f = 7;
int g = 8;

int pushbutton= 9;
int buttonState;


void setup()
{
  Serial.begin(9600);
  pinMode (a, OUTPUT);
  pinMode (b, OUTPUT);
  pinMode (c, OUTPUT);
  pinMode (d, OUTPUT);
  pinMode (e, OUTPUT);
  pinMode (f, OUTPUT);
  pinMode (g, OUTPUT);
  pinMode (pushbutton, INPUT);
  
}

void loop()
{
  
  int guessNo = random(0,9);
  numDis(num);
  buttonState = digitalRead(pushbutton);

  if (buttonState == HIGH && onState == 0) {
    guessNo = random(0,9);
    onState = (0);
    delay(1000);

    Serial.println("Guess and Think A Number: ");
    Serial.println(guessNo);

    disOff();
    delay (1000);
    numDis (guessNo);
    delay(500);

    if (guessNo == num) {
      for (int i = 0; i <= 9; i++) {
        numDis (i);
        delay(10);
      }
        delay (500);
        disOff();
    }
      delay (2000);
      onState = (0);
    }

      Serial.println(num);

}
int disOff(){
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);

  delay (1000);

  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);

  delay (1000);

  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);

  delay (1000);

}
int numDis(int no ) {

  if (no == 0) {

      digitalWrite(a, HIGH);
      digitalWrite(b, HIGH);
      digitalWrite(c, HIGH);
      digitalWrite(d, HIGH);
      digitalWrite(e, HIGH);
      digitalWrite(f, HIGH);
      digitalWrite(g, LOW);

  }
  
  else if (no == 1) {
      digitalWrite(a, LOW);
      digitalWrite(b, HIGH);
      digitalWrite(c, HIGH);
   	  digitalWrite(d, LOW);
      digitalWrite(e, LOW);
      digitalWrite(f, LOW);
      digitalWrite(g, LOW);

  }
  
  else if (no == 2) {
      digitalWrite(a, HIGH);
      digitalWrite(b, HIGH);
      digitalWrite(c, LOW);
      digitalWrite(d, HIGH);
      digitalWrite(e, HIGH);
      digitalWrite(f, LOW);
      digitalWrite(g, HIGH);

  } 
  
  else if (no == 3) {
      digitalWrite(a, HIGH);
      digitalWrite(b, HIGH);
      digitalWrite(c, HIGH);
      digitalWrite(d, HIGH);
      digitalWrite(e, LOW);
      digitalWrite(f, LOW);
      digitalWrite(g, HIGH);

  }
  
  else if (no == 4) {
      digitalWrite(a, LOW);
      digitalWrite(b, HIGH);
      digitalWrite(c, HIGH);
      digitalWrite(d, LOW);
      digitalWrite(e, LOW);
      digitalWrite(f, HIGH);
      digitalWrite(g, HIGH);

  }

  else if (no == 5) {
      digitalWrite(a, HIGH);
      digitalWrite(b, LOW);
      digitalWrite(c, HIGH);
      digitalWrite(d, HIGH);
      digitalWrite(e, LOW);
      digitalWrite(f, HIGH);
      digitalWrite(g, HIGH);
    
  }
  
  else if (no == 6) {
      digitalWrite(a, HIGH);
      digitalWrite(b, LOW);
      digitalWrite(c, HIGH);
      digitalWrite(d, HIGH);
      digitalWrite(e, HIGH);
      digitalWrite(f, HIGH);
      digitalWrite(g, HIGH);

  }
  
  else if (no == 7) {
      digitalWrite(a, HIGH);
      digitalWrite(b, HIGH);
      digitalWrite(c, HIGH);
      digitalWrite(d, LOW);
      digitalWrite(e, LOW);
      digitalWrite(f, LOW);
      digitalWrite(g, LOW);

  }
  
  else if (no == 8){
      digitalWrite(a, HIGH);
      digitalWrite(b, HIGH);
      digitalWrite(c, HIGH);
      digitalWrite(d, HIGH);
      digitalWrite(e, HIGH);
      digitalWrite(f, HIGH);
      digitalWrite(g, HIGH);

  }
  
  else if (no == 9){
      digitalWrite(a, HIGH);
      digitalWrite(b, HIGH);
      digitalWrite(c, HIGH);
      digitalWrite(d, HIGH);
      digitalWrite(e, LOW);
      digitalWrite(f, HIGH);
      digitalWrite(g, HIGH);
  }
}