using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class script1 : MonoBehaviour
{
    string a1, a2, a3;
    void Start()
    {
        //初始化
        a1 = "0";
        a2 = "0";
        a3 = "0";
    }
    void OnGUI()
    {
        GUI.Box(new Rect(5, 5, 400, 200), "計算");
        a1 = GUI.TextField(new Rect(5, 50, 75, 30), a1);
        GUI.Label(new Rect(85, 50, 10, 30), "+");
        a2 = GUI.TextField(new Rect(100, 50, 75, 30), a2);
        GUI.Label(new Rect(185, 50, 10, 30), "=");
        GUI.TextField(new Rect(200, 50, 75, 30), a3);
        if (GUI.Button(new Rect(70, 100, 100, 30), "加法"))
        {
            a3 = (int.Parse(a1) + int.Parse(a2)).ToString();
        }
    }
}