📄 ch2-3.jsp
字号:
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<!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=gb2312">
<title>两个数的加减乘除</title>
<style type="text/css">
<!--HTML表单提供数据，JSP动态网页对数据进行加减乘除，并将结果送到屏幕显示-->
</style></head>
<body bgcolor="#FFFFCC" style="text-align:center">
<table width="300" border="0" cellpadding="0" cellspacing="0" bgcolor="#ddeeff">
<tr align="center">
<td height="50">简单的计算</td>
</tr>
<tr>
<td height="100">
<%
float r1,r2,r3,r4;
String num1,num2;
num1=request.getParameter("n1");
num2=request.getParameter("n2");
float n1,n2;
n1=Float.parseFloat(num1);
n2=Float.parseFloat(num2);
r1=n1+n2;
out.println(n1+" + "+n2+" = "+r1+"<br>");
r2=n1-n2;
out.println(n1+" - "+n2+" = "+r2+"<br>");
r3=n1*n2;
out.println(n1+" * "+n2+" = "+r3+"<br>");
if(n2==0)
out.println(n1+" / "+n2+" = "+"除数不能为0");
else{
r4=n1/n2;
out.println(n1+" / "+n2+" = "+r4);
}
%>
</td>
</tr>
<tr>
<td height="30" align="center"><a href="ch2-3.htm">返回</a></td>
</tr>
</table>
</body>
</html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -