using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace SQL
{interface operater1{int calculate(int a, int b);}class Add : operater1{public int calculate(int a, int b){return a + b;}}class Sub : operater1{public int calculate(int a, int b){return a - b;}}class Mul : operater1{public int calculate(int a, int b){return a * b;}}class Div : operater1{public int calculate(int a, int b){if (b == 0){throw new Exception("除数不能为零！");}else{return a / b;}}}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace SQL
{interface Ifact//建一个工厂接口{operater1 CreatrOper();}class Addfactory : Ifact//加法工厂{public operater1 CreatrOper(){return new Add();}}class Subfactory : Ifact//减法工厂{public operater1 CreatrOper(){return new Sub();}}class Mulfactory : Ifact//乘法工厂{public operater1 CreatrOper(){return new Mul();}}class Divfactory : Ifact//除法工厂{public operater1 CreatrOper(){return new Div();}}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace SQL
{class Factory1{private Ifact fact;private operater1 oper1;public Factory1(string operation){switch (operation){case "+":fact = new Addfactory();oper1 = fact.CreatrOper();break;case "-":fact = new Subfactory();oper1 = fact.CreatrOper();break;case "*":fact = new Mulfactory();oper1 = fact.CreatrOper();break;case "/":fact = new Divfactory();oper1 = fact.CreatrOper();break;}}public int claations(int a, int b){return oper1.calculate(a, b);}}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Data;
using System.Windows.Forms;namespace SQL
{class DB{public string strCon = @"Data Source=.;Initial Catalog=Tiku;Integrated Security=True";public SqlConnection sqlcon = new SqlConnection();public SqlDataAdapter sda = new SqlDataAdapter();public DataSet ds = new DataSet();public DataTable dt = new DataTable();public string number1;public string operation;public string number2;public int i;public void dbcon()//链接数据库
        {try{sqlcon = new SqlConnection(strCon);}catch (Exception e){MessageBox.Show("数据库连接失败请重新链接：" + e.ToString());}}public void del(string sltstr)//删除所有题
        {dbcon();sqlcon.Open();SqlCommand sqlcom = new SqlCommand(sltstr, sqlcon);sqlcom.ExecuteNonQuery();MessageBox.Show("删除成功，请继续编题！");}public void dbinser(string inster)//插入数据存题
        {sqlcon = new SqlConnection(strCon);sqlcon.Open();SqlCommand sqlcom=new SqlCommand(inster ,sqlcon);try{int a = sqlcom.ExecuteNonQuery();if (a > 0){MessageBox.Show("保存成功！");}}catch (Exception e){MessageBox.Show("保存失败！" + e.ToString());}}public void Reader(string sltstr)//读题的方法
        {sqlcon = new SqlConnection(strCon);sqlcon.Open();SqlCommand sqlcom = new SqlCommand(sltstr, sqlcon);sda = new SqlDataAdapter(sqlcom);sda.Fill(ds);dt=ds.Tables[0];if (i <dt.Rows.Count){number1 = dt.Rows[i][0].ToString().Trim();operation = dt.Rows[i][1].ToString().Trim();number2 = dt.Rows[i][2].ToString().Trim();if (i == (dt.Rows.Count - 1)){MessageBox.Show("你的题做完了，去休息吧！一会我们继续！");}}i++;}}
}

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 SQL
{public partial class Form1 : Form{public Form1(){InitializeComponent();}DB db = new DB();private void button1_Click(object sender, EventArgs e){string inter = "insert into Ti(number1,operation,number2) values('" + textBox1.Text + "','" + comboBox1.Text + "','" + textBox2.Text + "')";db.dbinser(inter);textBox1.Clear();textBox2.Clear();}private void button2_Click(object sender, EventArgs e){string sltstr = @"truncate table Ti";//清除表中数据
            db.del(sltstr);}private void button3_Click(object sender, EventArgs e){Form2 fa = new Form2();fa.ShowDialog();}}
}

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 SQL
{public partial class Form2 : Form{public Form2(){InitializeComponent();}public static int right;public static int count;DB db = new DB();private void button1_Click(object sender, EventArgs e){duti();}private void textBox3_KeyDown(object sender, KeyEventArgs e){if (e.KeyCode == Keys.Enter){int a = int.Parse(textBox1.Text);int b = int.Parse(textBox2.Text);Factory1 factory = new Factory1(label1.Text);int answer = factory.claations(a, b);if (textBox3.Text == answer.ToString()){MessageBox.Show("回答正确!");right++;}else{MessageBox.Show("回答错误！");}count++;textBox3.Clear();duti();}                     }private void button2_Click(object sender, EventArgs e){Form3 fds = new Form3();fds.ShowDialog();}private void duti(){string sltstr = @"select number1,operation,number2 from Ti";db.Reader(sltstr);textBox1.Text = db.number1;textBox2.Text = db.number2;label1.Text = db.operation;}}
}

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 SQL
{public partial class Form3 : Form{public Form3(){InitializeComponent();}private void Form3_Load(object sender, EventArgs e){textBox1.Text = Form2.right.ToString();textBox2.Text = (Form2.count - Form2.right).ToString();textBox3.Text = ((Form2.right / (double)(Form2.count)) * 100).ToString() + "%";}private void button1_Click(object sender, EventArgs e){this.Close();}}
}