int buton;
const byte a=6,b=5,c=4,d=3,e=2,f=1,g=0;
int sayac=0;
void setup()
{
for(byte i=0;i<=6;i++){
pinMode(7,INPUT);
}
}
void loop()
{
buton=digitalRead(7);
if (buton==1)
{
sayac=sayac+1;
delay(300);   
}
yazdir(sayac);

}
void yazdir(byte rakam){
switch(rakam)
{
case 0: 
digitalWrite(a,HIGH);
digitalWrite(b,HIGH);
digitalWrite(c,HIGH);
digitalWrite(d,HIGH);
digitalWrite(e,HIGH);
digitalWrite(f,HIGH);
digitalWrite(g,LOW);
  break;
case 1:
digitalWrite(a,LOW);
digitalWrite(b,HIGH);
digitalWrite(c,HIGH);
digitalWrite(d,LOW);
digitalWrite(e,LOW);
digitalWrite(f,LOW);
digitalWrite(g,LOW);
  break;
case 2:
digitalWrite(a,HIGH);
digitalWrite(b,HIGH);
digitalWrite(c,LOW);
digitalWrite(d,HIGH);
digitalWrite(e,HIGH);
digitalWrite(f,LOW);
digitalWrite(g,HIGH );
  break;
case 3:
digitalWrite(a,HIGH);
digitalWrite(b,HIGH);
digitalWrite(c,HIGH);
digitalWrite(d,HIGH);
digitalWrite(e,LOW);
digitalWrite(f,LOW);
digitalWrite(g,HIGH);
  break;
case 4:
digitalWrite(a,LOW);
digitalWrite(b,HIGH);
digitalWrite(c,HIGH);
digitalWrite(d,LOW);
digitalWrite(e,LOW);
digitalWrite(f,HIGH);
digitalWrite(g,HIGH);
  break;
case 5:
digitalWrite(a,HIGH);
digitalWrite(b,LOW);
digitalWrite(c,HIGH); 
digitalWrite(d,HIGH);
digitalWrite(e,LOW);
digitalWrite(f,HIGH);
digitalWrite(g,HIGH);
  break;
case 6:
digitalWrite(a,HIGH);
digitalWrite(b,LOW);
digitalWrite(c,HIGH); 
digitalWrite(d,HIGH);
digitalWrite(e,HIGH);
digitalWrite(f,HIGH);
digitalWrite(g,HIGH);
  break;
case 7: 
digitalWrite(a,HIGH);
digitalWrite(b,HIGH);
digitalWrite(c,HIGH); 
digitalWrite(d,LOW);
digitalWrite(e,LOW);
digitalWrite(f,LOW);
digitalWrite(g,LOW);
  break;
case 8: 
digitalWrite(a,HIGH);
digitalWrite(b,HIGH);
digitalWrite(c,HIGH); 
digitalWrite(d,HIGH);
digitalWrite(e,HIGH);
digitalWrite(f,HIGH);
digitalWrite(g,HIGH);
  break;
case 9: 
digitalWrite(a,HIGH);
digitalWrite(b,HIGH);
digitalWrite(c,HIGH); 
digitalWrite(d,HIGH);
digitalWrite(e,LOW);
digitalWrite(f,HIGH);
digitalWrite(g,HIGH);
  break;
  }
}