C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Random crandom = new Random();
            int myrandom = crandom.Next();
            int c = myrandom % 3 + 1;
            textBox1.Text = "亂數" + c.ToString();
            if (c == 1)
            {
                button2.Visible = true;
                button3.Visible = false;
                button4.Visible = false;
            }
            if (c == 2)
            {
                button2.Visible = false;
                button3.Visible = true;
                button4.Visible = false;
            }
            if (c == 3)
            {
                button2.Visible = false;
                button3.Visible = false;
                button4.Visible = true;
            }
        }

           

           
           
        private void button4_Click(object sender, EventArgs e)
        {
       
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            button2.Visible = false;
            button3.Visible = false;
            button4.Visible = false;
        }
    }
}

using UnityEngine;

using System.Collections;

using UnityEngine.UI;

public class NewBehaviourScript : MonoBehaviour {

// Use this for initialization

void Start () {

}

// Update is called once per frame

void Update () {

}

public void myfun()

{

int num = Random.Range(1,4);

Text mytxt = GameObject.Find ("Canvas/Panel/Text").GetComponent<Text> ();

mytxt.text = num.ToString ();

Image Imgy = GameObject.Find ("Canvas/Panel/Image").GetComponent<Image>();

Imgy.sprite=Resources.Load<Sprite>("Image/"+num) as Sprite;

}

}