网上购物:商品数量的累计及金额的总计如何实现?
我做一个在线购物栏目,,每选取一种商品购物车中就累加上这种商品, 并且合计出它的总金额请问这段代码应怎样实现?
<% flag=0
id=request("id")
shuliang=request.form("shuliang")
huowu=split(session("huowu"),"+")
shuliangstr=split(session("shuliang"),"+")
for i=1 to ubound(huowu)
if huowu(i)=id then
shuliangstr(i)=cint(shuliangstr(i))+cint(shuliang)
flag=1
end if
str=str & "+" & shuliangstr(i)
next
session("shuliang")=str
if flag=0 then
session("huowu")=session("huowu")+ "+" + id
session("shuliang")=session("shuliang") & "+" & shuliang
end if
%>
这段代码是什么意思?