03jsp jobs

<%@page contentType="text/html;charset=utf-8"%>
<%!    public String getArea(double r)
    {
        if(r>0)
        {
            double area=r*r*3.14;
            return ""+area;
        }
        else{
            return("输入半径错误");
        }
    }
%>
<%
    String sR=request.getParameter("sR");
    double r=Double.parseDouble(sR);
%>
<br>我是圆
<br>半径是：<%=r%>
<br>面积是：<%=getArea(r) %>

<%@page contentType="text/html;charset=utf-8"%>
<%!    public String getArea(double a,double b,double c)
    {
        if(a>0&&b>0&&c>0)
        {
            double area=(a+b)*c/2;
            return ""+area;
        }
        else{
            return("输入有误");
        }
    }
%>
<%
    String sA=request.getParameter("sA");
    String sB=request.getParameter("sB");
    String sC=request.getParameter("sC");
    double a=Double.parseDouble(sA);
    double b=Double.parseDouble(sB);
    double c=Double.parseDouble(sC);
<br> I am a trapezoidal
%>
On <br> bottom, at the bottom, it is high: <% = sA%> <
<br> area is: <% = getArea (a, b, c)%>

<%@ page language="java" contentType="text/html; charset=utf-8"
	pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
     <%
    double r=2,a=4,b=6,c=3;
 %>
 计算半径为<%=r %>的圆的面积：
     <jsp:include page="circle.jsp">
     <jsp:param value="<%=r %>" name="sR"/>
     </jsp:include><br/>
 计算上底、下底、高为<%=a %>,<%=b %>,<%=c %>的梯形面积
     <jsp:include page="ladder.jsp">
         <jsp:param value="<%=a %>" name="sA"/>
         <jsp:param value="<%=b %>" name="sB"/>
         <jsp:param value="<%=c %>" name="sC"/>
     </jsp:include>
	
</body>
</html>

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