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  • 网页版四则运算(未全部完成)

         这次作业一直在做,一直在拖着,总感觉心里亏欠点什么,但是人就是这样,一件事情本来做起来就没有太多成功的几率,就想着延长工期,那就一直拖着吧,拖得时间越久你就会越发清晰地意识到自己已经非常触头去做那件事情了,仿佛它成了你的软肋,仿佛你命中注定就该不会去解决它一般。幸好,我还有继续做下去的勇气。。。

                                                                                                                                                                                            ———来自星星的感悟

        实现思路:其实思路并不难。

        1. 先编写一个运行界面HTML文件,用DW做非常简单。界面中包含定量的一些数据:比如参加运算的个数,运算数据的范围

        2.以及一些用户输入的数据,如:计算结果

        3.和运行界面返回的数据,如:生成的计算式,以及正确的计算结果,以及用户正确回答和错误回答的个数;

        4.编写运行程序.jsp文件,参数从先编写好的HTML文件中传到.jsp文件中

        5.具体实现方法以及详细步骤前面的习题中已经写过,前面使用的c++语言,这儿用的Java但是思想是一致的。

    以下是实现代码:

    index.html文件

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
    "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>四则运算计算器</title>
    <style type="text/css">
    <!--
    a {
        font-family: Georgia, Times New Roman, Times, serif;
        font-weight: bold;
    }
    .style1 {font-family: Verdana, Arial, Helvetica, sans-serif}
    a:link {
        color: #0000FF;
    }
    a:visited {
        color: #FF00FF;
    }
    a:hover {
        color: #00FFFF;
    }
    a:active {
        color: #00FF55;
    }
    -->
    </style></head>
    <form action="Untitled-1.jsp" method="get">
    </form><body background="1449af6eddc451daf9216940b6fd5266d21632e5.jpg">
    <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="771" height="49" title="落花雨">
      <param name="movie" value="&#33931;&#33931;%20-%20&#33853;&#33457;&#38632;%20%5Bmqms2%5D.mp3">
      <param name="quality" value="high">
      <embed src="&#33931;&#33931;%20-%20&#33853;&#33457;&#38632;%20%5Bmqms2%5D.mp3" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="771" height="49"></embed>
    </object>
    <div align="center">
      <table width="40%"  border="2" cellpadding="1">
        <caption align="left">
        <div align="center" class="style1">
          <h2 align="center"><strong>四则运算计算器
          </strong></h2>
        </div>
        
        </caption>
        <tr>
          <th width="67%" bordercolor="#D41F00" bgcolor="#C0C0C0" scope="row">参加计算的数的个数:</th>
          <td width="33%" align="center" valign="top" bordercolor="#0000FF" background="../1449af6eddc451daf9216940b6fd5266d21632e5.jpg" bgcolor="#FFFFFF"><div align="center" class="style1">
    <select name="number" size="1">
    <option>2</option>
    <option>3</option>
    <option>4</option>
    <option>5</option>
    <option>6</option>
    <option>7</option>
    <option>8</option>
    <option>9</option>
    <option>10</option>
    </select>
    <br/>
          </div></td>
        </tr>
        <tr>
          <th bordercolor="#D41F00" bgcolor="#C0C0C0" scope="row">参加计算的数据范围:</th>
          <td bordercolor="#0000FF" background="../1449af6eddc451daf9216940b6fd5266d21632e5.jpg" bgcolor="#2A3F55"><div align="center"><input type="text" name=fanwei/><br/>
    </div></td>
        </tr>
        <tr>
          <th bordercolor="#D41F00" bgcolor="#C0C0C0" scope="row">生成结果:</th>
          <td bordercolor="#0000FF" background="../1449af6eddc451daf9216940b6fd5266d21632e5.jpg" bgcolor="#808080"><div align="center">        
           <%
          request.setCharacterEncoding("utf-8");
          String shizi= request.getParameter("Suanshi");
          %>
          <%="shizi"%>
          <br/>
          </div></td>
        </tr>
        <tr>
          <th bordercolor="#D41F00" bgcolor="#C0C0C0" scope="row">您的计算结果:</th>
          <td bordercolor="#0000FF" background="../1449af6eddc451daf9216940b6fd5266d21632e5.jpg" bgcolor="#00FF00"><div align="center"><input type="text" name=jieguo/><br/>
          </div></td>
        </tr>
        <tr>
          <th bordercolor="#D41F00" bgcolor="#C0C0C0" scope="row">正确答案:</th>
          <td bordercolor="#0000FF" background="../1449af6eddc451daf9216940b6fd5266d21632e5.jpg" bgcolor="#FF00FF"><div align="center"><br/>
          </div></td>
        </tr>
        <tr>
          <th bordercolor="#D41F00" bgcolor="#C0C0C0" scope="row">总计:</th>
          <td bordercolor="#0000FF" background="../1449af6eddc451daf9216940b6fd5266d21632e5.jpg" bgcolor="#A0A0A4"><div align="center"><input type="text" name=sum/><br/>
          </div></td>
        </tr>
      </table>
      
      <h2 >
        <input type ="submit" name="submit" value="提交">    
        <input type ="reset" name="rein" value="重置">
      </h2>
      <h2 >&nbsp;</h2>
    </div>
    
    </body>
    </html>

    .jsp文件
    <%@ page language="java" contentType="text/html; charset=utf-8"
        pageEncoding="GB18030"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>
    处理代码
    </title>
    </head>
    <body>
    <%      request.setCharacterEncoding("utf-8");
            String n = request.getParameter("number");
            int number=Integer.valueOf(n);
            String ra = request.getParameter("rightAs");
            double    rightAs=Double.valueOf(ra);
            String fw = request.getParameter("fanwei"); 
            int fanwei=Integer.valueOf(fw);
            String jg = request.getParameter("jieguo");  
            double jieguo=Double.valueOf(jg);
    %>
    <% 
    class Did
    {
         double Date[]=new double[10];//存放数据的数组
         char Operator[]=new char [11];//存放运算符的数组
         char OperatorGo()//生成运算符的方法
         {
             double a;
             a = Math.random() % 4;
             if (a == 0)
             {
                 return'+';
             }
             if (a == 1)
             {
                 return'-';
             }
             if (a == 2)
             {
                 return'*';
             }
             else
             {
                 return'/';
             }
    
         }
    
    char Brackets()
    {
        return'(';
    }
    void Cun(int number, int scope)//将生成的数据存到数组内,scope为数据范围
    {
        int control=0;
        for (int i = 0; i < number; i++)
        {
            Date[i] =Math.random()%scope;
        }
        for (int j = 0; j < number +1; j++)
        {
            double m =Math.random()*6;
            if ((int)m==0&&control==0)
            {
                Operator[j]=Brackets();
                control++;
            }
            else
            {
                Operator[j] = OperatorGo();
            }
            
        }
    }
    void ChangeDate(int scope)
    {
        for (int i = 0; i < 10; i++)
        {
            if (Date[i] == 0||Date[i]<1)
            {
                Date[i] = Math.random()%scope ;
            }
        }
    }
    void ChangeOpreator(int number)
    {
    
        for (int i = 0; i < number; i++)
    {
    
            if (Operator[i] == '('&&i<=number-2)
    
            {
    
        
                Operator[i+2] = ')';
    
            }
    
            if (Operator[i] == '('&&i >= number - 2)
    
            {
        
                Operator[i] = OperatorGo();
    
            }
    
        }
    }
    String  Output(int number, int scope)//输出计算式
    {
        String Suanshi="";
        ChangeOpreator( number);
        ChangeDate(scope);
        
        for (int i = 0; i <number-1; i++)
        {
            Suanshi+=Date[i];
            if (Operator[i] == '(')
            {
                if (Operator[i - 1] == '+')
                {
                    Suanshi=Suanshi+"+";
                }
                if (Operator[i - 1] == '-')
                {
                    Suanshi=Suanshi+"-";
                }
                if (Operator[i - 1] == '*')
                {
                    Suanshi=Suanshi+"×";
                }
                if (Operator[i - 1] == '/')
                {
                    Suanshi=Suanshi+"÷";
                }
                System.out.println ( Operator[i]);
            }
            else if (Operator[i] == ')')
            {
                System.out.println ( Operator[i]);
                if (Operator[i - 1] == '+')
                {
                    Suanshi=Suanshi+"+";
                }
                if (Operator[i - 1] == '-')
                {
                    Suanshi=Suanshi+"-";
                }
                if (Operator[i - 1] == '×')
                {
                    Suanshi=Suanshi+"+";
                }
                if (Operator[i - 1] == '/')
                {
                    Suanshi=Suanshi+"÷";
                }
            }
            else
            {
                Suanshi=Suanshi+ String.valueOf(Operator[i]);
            }
            ChangeOpreator(number);
            ChangeDate(scope);
        
        }
        return Suanshi;
    }
    //以上为生成算式部分
    //下面是计算方法
    double Calculate(int number)
    {
        for (int k = 0; k < number - 1;k++)
        {
            if (Operator[k] == '(')
            {
                if (Operator[k + 1] == '+')
                {
                    Date[k + 2] = Date[k + 1] + Date[k + 2];
                    Date[k + 1] = 0;
                    Operator[k] = '+';
                    Operator[k + 2] = '+';
                }
                    
                if (Operator[k + 1] == '-')
                {
                    Date[k + 2] = Date[k + 1] - Date[k + 2];
                    Date[k + 1] = 0;
                    Operator[k] = '+';
                    Operator[k + 2] = '+';
                }
                if (Operator[k + 1] == '*')
                {
                    Date[k + 2] = Date[k + 1]*Date[k + 2];
                    Date[k + 1] = 0;
                    Operator[k] = '+';
                    if (Operator[k - 1] == '+')
                    {
                        Operator[k+1] = '+';
                    }
                    if (Operator[k - 1] == '-')
                    {
                        Operator[k+1] = '-';
                    }
                    if (Operator[k - 1] == '*' )
                    {
                        Date[k + 1] = 1;
                    }
                    
                    if (Operator[k - 1] == '/')
                    {
                        Date[k + 1] = 1;
                        Operator[k + 1] = '/';
                    }
                         Operator[k + 2] = '+';
                }
                if (Operator[k + 1] == '/')
                {
                    Date[k + 2] = Date[k + 1] / Date[k + 2];
                    Date[k + 1] = 0;
                    Operator[k] = '+';
                    if (Operator[k - 1] == '+')
                    {
                        Operator[k + 1] = '+';
                    }
                    if (Operator[k - 1] == '-')
                    {
                        Operator[k + 1] = '-';
                    }
                    if (Operator[k - 1] == '*')
                    {
                        Date[k + 1] = 1;
                    }
    
                    if (Operator[k - 1] == '/')
                    {
                        Date[k + 1] = 1;
                        Operator[k + 1] = '/';
                    }
                    Operator[k + 2] = '+';
                }
                
            }
        }
        for (int i = 0; i < number - 1; i++)
        {
            if (Operator[i] == '*')
            {
                Date[i + 1] = Date[i] * Date[i + 1];
                Date[i] = 0;
                if (i == 0)
                {
                    Operator[i] = '+';
                }
                if (Operator[i - 1] == '+')
                {
                    Operator[i] = '+';
                }
                if (Operator[i - 1] =='-')
                {
                    Operator[i] = '-';
                }
            }
            if (Operator[i] == '/')
            {
                Date[i + 1] = Date[i] / Date[i + 1];
                Date[i] = 0;
                if (i == 0)
                {
                    Operator[i] = '+';
                }
                if (Operator[i - 1] == '+')
                {
                    Operator[i] = '+';
                }
                if (Operator[i - 1] == '-')
                {
                    Operator[i] = '-';
                }
            }
    
        }
        for (int j = 0; j < number - 1; j++)
        {
            if (Operator[j] == '+')
            {
                Date[j + 1] = Date[j] + Date[j + 1];
                Date[j] = 0;
            }
            if (Operator[j] == '-')
            {
                Date[j + 1] = Date[j] - Date[j + 1];
                Date[j] = 0;
            }
        }
        return Date[number - 1];
    
    }
         
    } 
     %>
     <% class Do
     {
     
         public void main(String args[])
    
         {
            Did a=new Did();
            String Suansi;
            double Rightas;
            int R = 0, E = 0;
            for (int k = 0; k <number; k++)
            {
                a.Cun(number, fanwei);
                Suansi=a.Output(number, fanwei);
                Rightas=a.Calculate(number);
     
           }
       }
     }
     %>
     <jsp:forward page="zuoye.htm">
     </jsp:forward>
    </body>
    </html>

    文件运行结果截图:

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  • 原文地址:https://www.cnblogs.com/aishangtaxuefeihong/p/5408436.html
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