Hi ,need help

i have homework designed 0-99 counters our teacher tried lot of things wanted increase button not code button find wrong place


const int a=2;
const int b=3;
const int c=4;
const int d=5;
const int e=6;
const int f=7;
const int g=8;
const int dp=9;
const int konlar=10;
const int kbirler=11;
const int but=12;
int sayici;

void setup() {
(butondurumu)=digitalread(but);
if (butondurumu==0)  
{sayici=sayici+1;}      

for(int i=2;i<12;i++)
{delay(100);
pinmode(i,output);  
}
pinmode(but,input_pullup);
sayici=0;
}

void loop() {
int birler=sayici%10;
int onlar=sayici/10;
int i=0;
while(i<35)
{
goster(birler);
digitalwrite(kbirler,high);
digitalwrite(konlar,low);
//delay(10);
goster(onlar);
digitalwrite(kbirler,low);
digitalwrite(konlar,high);
//delay(10);
//i++;
}
//sayici++;

if (sayici==100)
sayici=0;

}
void goster(int n)
{
switch(n)
{
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;
}

}

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code: [select]

void setup() {
  (butondurumu) = digitalread(but);
  if (butondurumu == 0)
  {
    sayici = sayici + 1;
  }

  (int = 2; < 12; i++)
  { delay(100);
    pinmode(i, output);
  }
  pinmode(but, input_pullup);
  sayici = 0;
}
you need set pinmode of button before doing digitalread.

you need understand setup() runs once when first start program running. if want code react button presses after time need move code reads button to  loop().

you may want learn debouncing button input. see file > examples > 02.digital > debounce , https://www.arduino.cc/en/tutorial/debounce.

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