Calcolatrice.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class Calcolatrice : MonoBehaviour
{
    public string key = "5211";
    public string entered = "0";
    public Text displayText;
    public void ButtonClicked()
    {
        string bottone = EventSystem.current.currentSelectedGameObject.name;
        Debug.Log(bottone);
        switch (bottone)
        {
            case "Clear":
                entered = "";
                break;
            case "OK":
                if(entered == key)
                {
                   entered = "Esatto";
                } else
                {
                   entered = "Sbagliato";
                }
                break;

            default:
                int numeroCorrente;
                int.TryParse(entered, out numeroCorrente);
                int numeroBottone;
                int.TryParse(bottone, out numeroBottone);
                int nuovoValore = numeroCorrente * 10 + numeroBottone;
                entered = ""+nuovoValore;
                break;
        }
        displayText.text = entered;


    }
}