设计思路：
用ASP.net设计，调用策略模式。在第一个数和第二个数的文本框中输入数值，单击录题按钮，数值保存在n1,n2文档中,把要做的题都保存完后，单击开始按钮，开始做题，做完单击判断按钮，进行判断，进入下一题，同时提示回答是否正确。如果在时间内做完题就单击结束按钮，弹出对话框“答题结束” 总计，正确的个数及正确率显示出来。
页面设计代码如下：
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 one : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{ }
public static int Count = ;//总计的个数
public static int right = ;//正确的个数
int n = ; protected void Button8_Click(object sender, EventArgs e)
{
fh.Text="+";
fh.Visible = true;
}
protected void Button9_Click(object sender, EventArgs e)
{
fh.Text = "-";
fh.Visible = true;
}
protected void Button10_Click(object sender, EventArgs e)
{
fh.Text = "*";
fh.Visible = true;
}
protected void Button11_Click(object sender, EventArgs e)
{
fh.Text = "/";
fh.Visible = true;
}
//以上四个分别是+,-,*,/的单击事件
protected void luti_Click(object sender, EventArgs e)//录题事件
{
StreamWriter n1 = File.AppendText("n1.txt");//第一个数存入第一文档
n1.WriteLine(No1.Text);
n1.Close();
StreamWriter n2 = File.AppendText("n2.txt");//第二个数存入第二个文档
n2.WriteLine(fh.Text);
n2.Close();
StreamWriter n3 = File.AppendText("n3.txt");//结果存入第三个文档
n3.WriteLine(No2.Text);
n3.Close();
No1.Text = "";//清空数一，数二，结果
No2.Text="";
No3.Text="";
Response.Write("录题成功");
}
protected void ready_Click(object sender, EventArgs e)//开始的单击事件
{ string[] n1 = new string[];
n1 = File.ReadAllLines("n1.txt");//数值一的文档
No1.Text = n1[n];
string[] n2 = new string[];
n2 = File.ReadAllLines("n2.txt");
fh.Text = n2[n];
string[] n3 = new string[];
n3 = File.ReadAllLines("n3.txt");
No2.Text = n3[n];
n++; }
protected void over_Click(object sender, EventArgs e)
{ No3.Enabled = false;
Response.Write("运算结束！");
all.Text = Count.ToString();//题目总数
rt.Text = right.ToString();//正确的个数
rt1.Text = ((right / (double)(Count)) * ).ToString() + "%";//正确率
}
protected void ifright_Click(object sender, EventArgs e)
{
Class1.mark mark = null;
double a = Convert.ToDouble(No1.Text);//第一个数赋值
double b = Convert.ToDouble(No2.Text);//第二个数赋值
string c = fh.Text;//运算符号
switch (c)
{
case "+":
mark = new Class1.mark(new Class1.add());//调用策略模式
break;
case "-":
mark = new Class1.mark(new Class1.sub());
break;
case "*":
mark = new Class1.mark(new Class1.mul());
break;
case "/":
mark = new Class1.mark(new Class1.div());
break; default:
break;
}
string result = mark.Call(a, b,c).ToString();
if (No3.Text == result.ToString())
{
Response.Write("回答正确！下一题请按开始按钮！");
right++;
Count++;
} else
{ Response.Write("回答错误！下一题请按开始按钮！");
Count++; }
//清空
No3.Style.Clear();
}
}
策略模式代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web; /// <summary>
///Class1 的摘要说明
/// </summary>
public class Class1
{ //定义一个接口
public interface Calculator
{
double Call(double a, double b);//定义一个方法用于计算
}
private double a;
private double b;//定义变量
public class add : Calculator
{
public double Call(double a, double b)
{
double result;
result = a + b;
return result;
}
}
public class sub : Calculator
{
public double Call(double a, double b)
{
double result;
result = a - b;
return result;
}
}
public class mul : Calculator
{
public double Call(double a, double b)
{
double result;
result = a * b;
return result;
}
}
public class div : Calculator
{
public double Call(double a, double b)
{
double result;
result = a / b;
return result;
}
}
public class mark
{
private Calculator calculate; public mark(Calculator calculate)
{
this.calculate = calculate;
}
public double Call(double a, double b, string m)
{
return this.calculate.Call(a, b);
}
}
}
运行后的图片：