四则运算2.0版程序
一、程序的设计思想：
将之前的1.0版程序改写为网页版。
二、源程序代码：
welcom.jsp（欢迎界面）
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>在线答题系统</title> <style type="text/css"> body {background-image:url(3.jpg);} </style> </head> <body > <form id="form2" name="form2" method="post" action="ZhengShu.jsp"> <div style="text-align:center;color:#F09"> <br> <br> <br> <br> <br> <br> 请输入出题的个数：<input name="amount" type="text" value=""/> </br></br> <input type="submit" value="提交" /> <input type="reset" value="重置" /> </div> </form> </body> </html>
welcomInput.jsp(输入界面)
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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>Insert title here</title> </head> <body> <% try { int amount=Integer.parseInt(request.getParameter("amount")); session.setAttribute("amount",amount); response.setHeader("refresh","0;url = ZhengShu.jsp"); } catch(Exception e){ %> <script type="text/javascript"> alert("输入错误，点击确定返回重新输入！！！") </script> <% response.setHeader("refresh","0;url = WelcomeInput.jsp"); } %> </body> </html>
zhengshu.jsp(产生算术)
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" import="java.util.Random" import="java.sql.Connection" import="java.sql.DriverManager" import="java.util.Scanner" %> <!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>Insert title here</title> <style type="text/css"> body { background-image: url(3.jpg); } </style> </head> <body> <% String suanshi[]=new String [10000]; String result1[]=new String[10000]; int num=Integer.parseInt(request.getParameter("amount")); Scanner in = new Scanner(System.in); Random random = new Random(); int count = 0; int result = 0; int a=0,b=0; String fuhao="***"; for(int i=0;i<num;i++) { count=random.nextInt(4)+1;//随机产生乘除法 if(count==1) { //乘法 fuhao="*"; a = random.nextInt(9)+1; b = random.nextInt(9)+1; result = a*b; } else if(count==2) { //除法 fuhao="/"; a = random.nextInt(9)+1; b = random.nextInt(9)+1; a = a*b; result = a/b; } else if(count==3) { //减法 fuhao="-"; a = random.nextInt(99)+1; b = random.nextInt(a); result = a-b; } else{ //加法 fuhao="+"; a = random.nextInt(99); b = random.nextInt(100-a)+1; result = a+b; } suanshi[i]=String.valueOf(a)+fuhao+String.valueOf(b); result1[i]=String.valueOf(result); request.setAttribute("suanshi", suanshi[i]); request.setAttribute("result1",result1[i]); request.setAttribute("i",i); if((i+1)==num) { %> <form id="form2" name="form2" method="post" action="toDatebase.jsp"> <div style="text-align:center"> <br> <% out.print(suanshi[i]+"="); %> <br> 请输入答案：<input name="result" type="text" value=""/><br /><br/> <input name="" type="submit" value="提交" /> </div> </form> <% } else { %> <form id="form2" name="form2" method="post" action="toDatebase.jsp"> <div style="text-align:center"> <br> <% out.print(suanshi[i]+"="); %> <br> 请输入答案：<input name="result" type="text" value=""/><br /><br/> </div> </form> <% } } %> </body> </html>
三、运行结果截图：
（1）输入出题个数
（2）展示出题结果
四、编程总结及体会：
