fx2_2.jsp

黑魔方JSP基础教程源代码(耿祥义编著)是这里有课件和jsp源代码

<%! double qAbs(double x){
 			double y;
 			y=x;
 			if (y<0) 
 			  return(-y);
 			else 
 			  return(y);
    }
 %>
 <%String str1=request.getParameter("txt1");
               
 		double x,y;
 		
 		 x=Double.parseDouble(str1);
 		 y=qAbs(x);
 		
 %>
 <p><%=str1%>的绝对值是<%=y%>