lua-users home
lua-l archive

[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index] [Thread Index] 

Vitaly Vaghnais wrote:

Hello All,
I found interesting problem while I try Lua 5.0.2 (Actualy I didn't know where is problem in my C code for working with XML files or in Lua)
I got error message: test.lua:35: attempt to perform arithmetic on a string value 

This line looks: printf("Test %d\n",1+1);
Also if I try make instand of callig printf

a=0
a=a+1
printf("And value is %d\n",a)
Result:
And value is 0

Anybody known where may be problem?



This is part of code:
...
function printf(...)
   io.write(string.format(unpack(arg)))
end
function space(ix)
   while ix > 0 do
       ix=ix-1
       printf("  ")
   end
end
function enumerateBxmlTree(bxml,id,level)
   local idInfo,bxmlName,bxmlValue,ids
   ids = id;
   if ids == nil then ids=0 end
   idInfo=Bxml.enum(bxml,id)
   while idInfo ~= nil do
       bxmlName=Bxml.name(bxml,idInfo)
       bxmlValue=Bxml.value(bxml,idInfo)
       if bxmlName == nil then bxmlName="" end
       if bxmlValue == nil then bxmlValue="" end
       if Bxml.links(bxml,idInfo) > 0 then
           space(level)
printf("<section name=\"%s\" value=\"%s\">\n",bxmlName,bxmlValue) 
           enumerateBxmlTree(bxml,idInfo,level+1)
           space(level)
           printf("</section>\n")
       else
           space(level)
           printf("<entry name=\"%s\" value=\"%s\"/>\n",bxmlName,bxmlValue)
       end
       idInfo=Bxml.enum(bxml,id,idInfo)
   end
end

-- anything here is non numerical???
printf("Test %d\n",1+1);


I tried the code above (with Lua 5.0) and I got:

Test 2
And value is 1

to:

printf("Test %d\n",1+1);

a=0
a=a+1
printf("And value is %d\n",a)

So it seems normal to me...
OK, I compiled Lua 5.0.2, same result. I guess the problem is within your code... 

--
--=#=--=#=--=#=--=#=--=#=--=#=--=#=--=#=--=#=--
Philippe Lhoste (Paris -- France)
Professional programmer and amateur artist
http://jove.prohosting.com/~philho/ (outdated)
http://philho.multimania.com (in French, for files to download)
--=#=--=#=--=#=--=#=--=#=--=#=--=#=--=#=--=#=--