// instead of  String  you can use  char*
#include <LiquidCrystal.h>
LiquidCrystal lcd(12,11,10,9,8,7);
#define tipka 3

void setup() {
  // put your setup code here, to run once:
  lcd.begin(16,2);
  pinMode(tipka, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
  static int stevec = 0;
  if(!digitalRead(tipka)){
    stevec++;
    lcd.setCursor(0,1);
    lcd.print(stevec);
    delay(500);
  }
}