int G=6,F=5,COM1=4,A=3,B=10,DP=7,C=8,COM2=9,D=11,E=12;
int myDelay(1000);
int a=0;
void setup() {
  
  Serial.begin(9600);
  //Uppar part
  pinMode(G,OUTPUT);
  pinMode(F,OUTPUT);
  pinMode(COM1,OUTPUT);
  pinMode(A,OUTPUT);
  pinMode(B,OUTPUT);

  //Bottom Part
  pinMode(DP,OUTPUT);
  pinMode(C,OUTPUT);
  pinMode(COM2,OUTPUT);
  pinMode(D,OUTPUT);
  pinMode(E,OUTPUT);

}

void loop() {

Serial.println("Which digit you want to display?? ");
  while (Serial.available()==0)
  {

  }
 a=Serial.parseInt();
 
switch(a){

case 1:
{
  //CODE for 1:

  for(int i=1; i<=12; i++)
  {
    if(i!=B && i!=C)
  {
  digitalWrite(i,HIGH);
  /*digitalWrite(B,LOW);
  digitalWrite(C,LOW);
  */
  
  }
else{
  digitalWrite(i,LOW);
} 
 /* add delay(1000) here to actually see and feel
  how the pins are being turned off and on */
  }
  delay(myDelay); 
   break;
}
case 2:
{
 //CODE for 2
 
  for(int i=1; i<=12; i++)
  {
    if(i!=A && i!=B && i!=G && i!=E && i!=D)
  {
  digitalWrite(i,HIGH);
  }
else{ 
  digitalWrite(i,LOW);
}
 }
 delay(myDelay);
 break;
}

case 3:
{
 //CODE for 3

  for(int i=1; i<=12; i++)
  {
    if(i!=A && i!=B && i!=G && i!=C && i!=D)
    digitalWrite(i,HIGH);
 
else
  digitalWrite(i,LOW);
 }

 delay(myDelay);
 break;
}



case 4:
{
 //CODE for 4

  for(int i=1; i<=12; i++)
  {
    if(i!=F && i!=G && i!=B && i!=C)
  {
  digitalWrite(i,HIGH);
  }
else{
  digitalWrite(i,LOW); }
 }
 delay(myDelay);
 break;
}


case 5:
{
 //CODE for 5
  for(int i=1; i<=12; i++)
  {
    if(i!=F && i!=G && i!=A && i!=C && i!=D)
  {
  digitalWrite(i,HIGH);
  }
else{
  digitalWrite(i,LOW); }
 }
 delay(myDelay);
 break;
}



case 6:
{
//CODE for 6
  for(int i=1; i<=12; i++)
  {
    if(i!=F && i!=E && i!=A && i!=G && i!=C && i!=D)
  {
  digitalWrite(i,HIGH);
  }
else{
  digitalWrite(i,LOW); }
 }
 delay(myDelay);
 break;

}


case 7:
{
//CODE for 7:

  for(int i=1; i<=12; i++)
  {
    if(i!=B && i!=C && i!=A)
  {
  digitalWrite(i,HIGH);
  /*digitalWrite(B,LOW);
  digitalWrite(C,LOW);
  */
  
  }
else{
  digitalWrite(i,LOW); /* declaring this else is important since
  otherwise it may happen that in previous digit representation
   these pins were set as HIGH and hence were not put to 'LOW' to
   which is the necessary condition for this digit to be displayed
   can check it for digit = 7 by removing this else part*/
} 

}
 delay(myDelay);
 break;
}


case 8:
{

//CODE for 8
  for(int i=1; i<=12; i++)
  {
    if(i!=COM1 && i!=COM2 && i!=DP)
    digitalWrite(i,LOW);
  
  else{
    digitalWrite(i,HIGH);
  } /* This else part is not required necessarliy as com1 & com 2 will
      never be set to LOW (for device to work) this else only required
      for decimal point to be off
    */
  }
   delay(myDelay);
   break;
}

case 9:
{
//CODE for 9
  for(int i=1; i<=12; i++)
  {
    if(i!=COM1 && i!=COM2 && i!=E && i!=DP)
  digitalWrite(i,LOW);

else{
  digitalWrite(i, HIGH);
}
  }
 delay(myDelay);
 break;
}

default:
Serial.println("Please Enter a digit between 0 to 9 only \n");
break;
}
}