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

namespace arraySet
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public int[][] Set = new int[3][];
        public void 表示()
        {
            string S; listBox1.Items.Clear();
            foreach (int[] A in Set)
            {
                if (A.Length == 0) S = "{}";
                else
                {
                    S = ""; foreach (int X in A) S += X.ToString() + ", ";
                    S="{"+S.Substring(0,S.Length-2)+"}";
                }
                listBox1.Items.Add(S);
            }
        }
        private void button1_Click(object sender, EventArgs e)
        {
            Set[0] = new int[3] { 1, 2, 3 }; Set[1] = new int[0] { };
            Set[2] = new int[4] { 4, 5, 6, 7 }; 表示();
        }
        private bool SetMember(int X, int[] S)
        {
            foreach(int A in S) if(A==X) return true;
            return false;
        }
        private void button2_Click(object sender, EventArgs e)
        {
            int EL = int.Parse(textBox1.Text);
            int ID = int.Parse(textBox2.Text);
            MessageBox.Show(SetMember(EL, Set[ID]).ToString());
        }
        private int[] AddMember(int X, int[] S)
        {
            if (SetMember(X, S)) return S;
            int[] S2 = new int[S.Length + 1];
            for (int i = 0; i < S.Length; i++) S2[i] = S[i];
            S2[S.Length] = X;
            return S2;
        }
        private void button3_Click(object sender, EventArgs e)
        {
            int EL = int.Parse(textBox1.Text);
            int ID = int.Parse(textBox2.Text);
            Set[ID]=AddMember(EL, Set[ID]); 表示();
        }
        private int[] DelMember(int X, int[] S)
        {
            if (!SetMember(X, S)) return S;
            int[] S2 = new int[S.Length - 1]; int ii = 0;
            for (int i = 0; i < S.Length; i++) if(S[i]!=X)S2[ii++] = S[i];
            return S2;
        }
        private void button4_Click(object sender, EventArgs e)
        {
            int EL = int.Parse(textBox1.Text);
            int ID = int.Parse(textBox2.Text);
            Set[ID] = DelMember(EL, Set[ID]); 表示();
        }
        private int[] Union(int[]S1, int[] S2)
        {
            int[] S=S1; foreach(int EL in S2) S=AddMember(EL,S);
            return S;
        }
        private void button5_Click(object sender, EventArgs e)
        {
            int ID1 = int.Parse(textBox2.Text);
            int ID2 = int.Parse(textBox3.Text);
            Set[ID1] = Union(Set[ID1], Set[ID2]); 表示();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            button1_Click(sender, e);
        
        }
        private int[] Intersection(int[] S1, int[] S2)
        {
            int[] S = new int[0] { };
            foreach (int EL in S1) if(SetMember(EL,S2)) S = AddMember(EL, S);
            return S;
        }
        private void button6_Click(object sender, EventArgs e)
        {
            int ID1 = int.Parse(textBox2.Text);
            int ID2 = int.Parse(textBox3.Text);
            Set[ID1] = Intersection(Set[ID1], Set[ID2]); 表示();
        }
        private int[] Difference(int[] S1, int[] S2)
        {
            int[] S = new int[0] { };
            foreach (int EL in S1) if (!SetMember(EL, S2)) S = AddMember(EL, S);
            return S;
        }
        private void button7_Click(object sender, EventArgs e)
        {
            int ID1 = int.Parse(textBox2.Text);
            int ID2 = int.Parse(textBox3.Text);
            Set[ID1] = Difference(Set[ID1], Set[ID2]); 表示();
        }
        private int[] Clone(int[] S2)
        {
            int[] S = S2; return S;
        }
        private void button8_Click(object sender, EventArgs e)
        {
            int ID1 = int.Parse(textBox2.Text);
            int ID2 = int.Parse(textBox3.Text);
            Set[ID1] = Clone(Set[ID2]); 表示();
        }
    }
}