byte angka[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}
  };
  byte i=90,number
boolean b1Pre,b1Noww,b2Pre,b2Now,b3Pre,b3Now;
const int buzzerPin=13;
}
void setup(){
  DDRD=0XFF;
  
  pinMode(Ao,INPUT_PULLUP);
  pinMode(A1, INPUT_PULLUP);
  pinMode(A2, INPUT_PULLUP);
  pinMode(buzzerpin, OUTPUT);
}
Void loop(){
  b1pre=b1Now;
  b1Now=!digitalRead(A0);
  delay(50);
  b2pre=b2Now;
  b2Now=!digitalRead(A1);
  delay(50);
  b3pre=b3Now;
  b3Now=!digitalRead(A2);
  delay(50);

  if(!b1pre and b1Now){i++;
  digitalWrite(buzzerpin,HIGH);
  delay(100);
  digitalWrite(buzzeerpin,LOW);
  }
if(!b2pre and b2Now){i--;
digitalWrite(buzzerpin,HIGH);
delay(100);
digitalWrite(buzzerpin,LOW);
}
if(!b3Pre and b3Now){i=100;
digitalWrite(buzzerpin,HIGH);
delay(100);
digitalWrite(buzzerpin,LOW);
}
number=i%10;
PORTD=~angka[numbe];