剪刀石頭布

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;

}
if (c == 2)
{
button3.Visible = true;

}
if (c == 3)
{
button4.Visible = true;

}
}