20210303第一次课下作业

1~100的偶数和是?(素数还没会）

答题

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'index.jsp' starting page</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
  </head>
  
  <body>
    求1-100的偶数和?
    <hr>
    <br>
</body>

<%
    int a, sum = 0;
    for (a = 1; a <= 100; a++) {
        if (a % 2 == 0) {
            sum += a;
        }
    }
%>

1-100中间的偶数和是:
<%=sum%>
</html>

百度后

将
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>

改为
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>

（位于作业第一行）

 

posted @ 2021-03-11 02:55  纪明  阅读(24)  评论(0)  编辑  收藏  举报