p104session

  编写1个JSP页面inputNumber.jsp，该页面提供一个表单，用户可以通过表单输入两个数和四则运算符号提交给该页面。用户提交表单后，JSP页面inputNumber.jsp将计算任务交给一个Tag文件Computer.tag去完成。(Write a JSP page inputNumber.jsp, the page provides a form where the user can enter through the form of two numbers and four arithmetic symbols presented to the page. After the user submits the form, JSP pages inputNumber.jsp computing tasks to a Tag file Computer.tag to complete.)