四则运算
<%@ 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>
<!-- 居中 -->
<form action="question.jsp" method="post">
<h2 >请输入题目数量</h2>
<div>
<input type="text" name ="quantity" style="border:1px solid #00a0e9; width:400px; line-height:20px; padding:9px 5px; display:block; float:left;" />
<input type="submit" style="width:90px; line-height:40px; background-color:#00a0e9; border:none; display:block; float:left; color:#fff;" value="提交" />
</div>
</form>
</body>
</html>
此页面用于输入题目数量,结果:
<%@ 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> <form action="judge.jsp" method="post"> <body> <% //Integer.parseInt(str); 获取题目数量 int n = Integer.parseInt(request.getParameter("quantity")); //out.print(n); int a; int b; //int n=50; String operator = ""; String[] expression = new String[n]; int[] result = new int[n]; int[] user = new int[n]; //1.随机数 2.符号 3.是否可以生成表达式---满足输出以及储存结果 不满足重新生成随机数和表达式 int i = 0; // for (i = 0; i < n; ) while (i < n) { //生成一个表达式 a = (int) (1 + Math.random() * 99); b = (int) (1 + Math.random() * 99); int k = (int) (1 + Math.random() * 3);//1~4对应不同的运算符 switch (k) { case 1: operator = "+"; break; case 2: operator = "-"; break; case 3: operator = "*"; break; case 4: operator = "/"; break; } //判断表达式是否满足要求 if (operator.equals("+") && a + b < 100) { result[i] = a + b; out.print(i+1+"."+a + operator + b + "=" + "</br>"); %> <input type="text" name=<%="user"+i%>><br> <% i++; } //out.print(expression[i]); else if (operator.equals("-") && a - b >= 0) { result[i] = a - b; out.print(i+1+"."+a + operator + b + "=" + "</br>"); %> <input type="text" name=<%="user"+i%>><br> <% i++; } else if (operator.equals("*") && a * b <= 100) { result[i] = a * b; out.print(i+1+"."+a + operator + b + "=" + "</br>"); %> <input type="text" name=<%="user"+i%>><br> <% i++; } else if (operator.equals("/") && (a % b == 0) && b != 0) { result[i] = a / b; out.print(i+1+"."+a + operator + b + "=" + "</br>"); %> <input type="text" name=<%="user"+i%>><br> <% i++; } %> <%-- <input type="text" name="<%=user[i]%>"> --%> <% }; %> <% //session.setAttribute("useras", user); session.setAttribute("crctas", result); session.setAttribute("num",n); %> <br /> <input type="submit" name="submit" value="提交"> </form> </body> </html>
此页面用于出题:
<%@ 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> <center> <% //int[] user = (int[]) session.getAttribute("useras"); int[] result = (int[]) session.getAttribute("crctas"); int n = (Integer) session.getAttribute("num"); int []user=new int[n]; int count = 0; for(int i=0;i<result.length;i++) { int a=Integer.parseInt(request.getParameter("user"+i)); user[i]=a; } for (int i = 0; i < n; i++) { if (user[i] == result[i]) { out.print("第" + (i + 1 )+ "题回答正确 "); count++; } else out.print("第" + (i + 1) + "题回答错误 ,正确答案是:" + result[i]); out.println("<br>"); } out.print("总共做对 " + count + "道题,错了 "+(n-count)+"道题"); %> </center> </body> </html>
此页面显示判断结果:
总结:
当时有些功能不知道怎么实现,在某位好心人的帮助下,这些雪中送炭的代码摘录下来在这里了哦
<input type="text" name=<%="user"+i%>><br>
<% //session.setAttribute("useras", user); session.setAttribute("crctas", result); session.setAttribute("num",n); %>
int[] result = (int[]) session.getAttribute("crctas"); int n = (Integer) session.getAttribute("num");
