ASP. NET implementation + code encapsulation + Policy mode

Design interface:

Test interface:

Code:

Using system;using system.collections.generic;using system.linq;using system.web; <summary>///class2 Summary description///</summary> public interface itaxstragety {int Calcul (int A, in     T b);        } class Class2:itaxstragety {public int Calcul (int a, int b) {return a + B;        }} class Sub:itaxstragety {public int Calcul (int a, int b) {return a-A;         }} class Sheng:itaxstragety {public int Calcul (int a, int b) {return a * b;         }} class Chu:itaxstragety {public int Calcul (int a, int b) {return A/b;        }} public class Tiaoyong {public int num1 = 0;        public int num2 = 0;                public void Yunsuan (String str) {if (str = = "+") {CLASS2 cl = new Class2 (); All             Calcul (NUM1, num2); } if (str = = "-")           {Sub Su = new sub (); Su.              Calcul (NUM1, num2);                } if (str = = "*") {sheng sh= new sheng (); Sh.             Calcul (NUM1, num2);                } if (str = = "/") {chu ch = new Chu (); Ch.             Calcul (NUM1, num2); }         }    }

Web code:

Using system;using system.collections.generic;using system.linq;using system.web;using System.Web.UI;using     System.web.ui.webcontrols;using System.IO;        Public partial class _default:system.web.ui.page {int count = 0;        protected void Page_Load (object sender, EventArgs e) {} string path = "E:\rtf";        public static int sum;         int i = 1; protected void Button1_Click (object sender, EventArgs e) {StreamWriter writer = file.appendtext ("writ            Er.txt "); Writer.            WriteLine (TextBox1.Text); Writer.            Close ();            StreamWriter writer1 = File.appendtext ("Writer.txt1"); Writer1.            WriteLine (Textbox5.text); Writer1.            Close ();            StreamWriter writer2 = File.appendtext ("Writer.txt2"); Writer2.            WriteLine (TextBox2.Text); Writer2.            Close ();              Textbox6.text + = TextBox1.Text + textbox5.text + textbox2.text + "\ r \ n"; string f = Textbox5.texT Switch (f) {case ' + ': sum = Int. Parse (TextBox1.Text) + int.                    Parse (TextBox2.Text);                    Textbox7.text + = sum + "\ r \ n";                     Shizi ();                Break Case "-": sum = Int. Parse (TextBox1.Text)-Int.                    Parse (TextBox2.Text);                    Shizi ();                    Textbox7.text + = sum + "\ r \ n";                Break Case "*": sum = Int. Parse (textbox1.text) * Int.                    Parse (TextBox2.Text);                    Shizi ();                    Textbox7.text + = sum + "\ r \ n";                Break Case "/": sum = Int. Parse (TextBox1.Text)/Int.                    Parse (TextBox2.Text);                    Shizi ();                    Textbox7.text + = sum + "\ r \ n";                Break            Default:break; }} public void Shizi ()//method of writing the question {TextBox1.text = "";            TextBox2.Text = "";        Textbox5.text = "";            } protected void Button2_Click (object sender, EventArgs e) {if (Button2.text = = "Show Answer")                {textbox7.visible = true;            Button2.text = "Hide Answer";                } else if (Button2.text = = "Hide Answer") {textbox7.visible = false;             Button2.text = "show Answer"; }} protected void Button3_Click (object sender, EventArgs e) {string[] ll = new STRING[10            0];            ll = File.ReadAllLines ("Writer.txt");             Textbox8.text = ll[0];            string[] Lli = new string[100];            Lli = File.ReadAllLines ("Writer.txt1");             Textbox9.text = lli[0];            String[] LLP = new STRING[100];            LLP = File.ReadAllLines ("Writer.txt2");        Textbox10.text = llp[0];      } protected void Button4_Click (object sender, EventArgs e)  {File.writealltext ("Writer.txt", String.            Empty); File.writealltext ("Writer1.txt", String.            Empty); File.writealltext ("Writer2.txt", String.        Empty);            } protected void Button5_click (object sender, EventArgs e) {tiaoyong ti =new tiaoyong (); Ti.num1=int.            Parse (TextBox1.Text); Ti.num2=int.            Parse (TextBox2.Text);            String St=textbox5.text;                        Ti.yunsuan (ST);            TextBox7 = convert.tostring (MM.C); Daan.            Text + = sum + "\ r \ n"; Tiaoyong//ee.c = Int. Parse (left.            Text); EE.N = Int. Parse (right.            Text);            String a = Convert.ToString (MM.M);            Ee.yunsuan (a);            string m = Textbox5.text; Switch (m)//{//Case "+"://sum = Int. Parse (TextBox1.Text) + int.             Parse (TextBox2.Text);            Break  Case "-"://      sum = Int. Parse (TextBox1.Text)-Int.            Parse (TextBox2.Text);            Break Case "*"://sum = Int. Parse (textbox1.text) * Int.            Parse (TextBox2.Text);            Break Case "/"://sum = Int. Parse (TextBox1.Text)/Int.            Parse (TextBox2.Text);            Break             Default://break; } if (Textbox11.text = = Sum.              ToString ()) {Response.Write ("<script>alert (' answer correct ') </script>"); } else if (textbox11.text! = sum.            ToString ()) {Response.Write ("<script>alert (' answer error ') </script>");            } Textbox11.text = "";            string[] ll = new STRING[100];            ll = File.ReadAllLines ("Writer.txt");            Textbox8.text = Ll[i];            string[] Lli = new string[100];  Lli = File.ReadAllLines ("Writer1.txt");          Textbox9.text = Lli[i];            String[] LLP = new STRING[100];            LLP = File.ReadAllLines ("Writer2.txt");            Textbox10.text = Llp[i];          i++; }    }

Policy Encapsulation Code

Using system;using system.collections.generic;using system.linq;using system.text;                namespace shuxuefudao{public interface itaxstragety {int Calcul (int a,int b);        } class Class2:itaxstragety {public int Calcul (int a, int b) {return a + B;       }} class Sub:itaxstragety {public int Calcul (int a, int b) {return a-A;                               }} class Sheng:itaxstragety {public int Calcul (int a, int b) {return a *b; }} class Chu:itaxstragety {public int Calcul (int a, int b) {retur        n A/b;         }} class Tiaoyong {public int c=0;         public int n=0;                 public void Yunsuan (string m) {if (m== "+") {Class2 ss = new Class2 (); Ss.                                                   Calcul (C,n);             } if (m== "-") {Sub ww = new Sub (); Ww.                               Calcul (C,n);                 } if (m== "*") {sheng qq = new Sheng (); Sql                                         Calcul (C,n);                 } if (m== "/") {chu pp = new Chu (); Pp.                           Calcul (C,n); }                   }    }}

　　

ASP. NET implementation + code encapsulation + Policy mode