<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ include file="circle.jsp" %> <%@ include file="ladder.jsp" %> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> </body> </html>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <div> <form action="main.jsp"> 圆的半径：<input type="text" name="R" > <br> <em id="__mceDel"> <input type="submit" value="圆的面积"> <br> </form> </div> <% String R=request.getParameter("R"); if(R!=null){ double PI=3.14; double r=Double.parseDouble(R); double area=r*r*3.14; out.print("圆的面积为"+area); request.setAttribute("r", r); request.setAttribute("area", area); } %> </body> </html> </em>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <div> <form action="main.jsp"> 上底: <input type="text" name="a"> <br> 下底: <input type="text" name="b" > <br> 高度: <input type="text" name="h"> <br> <input type="submit" value="梯形的面积"> <br><br> </form> </div> <% String a=request.getParameter("a"); String b=request.getParameter("b"); String h=request.getParameter("h"); if(a!=null&&b!=null&&h!=null){ double A=Double.parseDouble(a); double B=Double.parseDouble(b); double H=Double.parseDouble(h); double M=(A+B)*H/2; out.print("梯形的面积为："+M); request.setAttribute("A", a); request.setAttribute("B", b); request.setAttribute("H", h); request.setAttribute("M", M); } %> </body> </html>
