template problem in c++

[pompom]

hello all,

first of all I'd like to say i really like the site, it has helped me a lot these last weeks. i'm a big fan :-)

but here's the problem I've got:

i've made an AVL tree using template for the type of the Key and the Value (in the nodes).
then I initialized it, like this:

AVLTree<std::st ring, int> avl_common;

so just an AVL tree with key type => string and
value type=> int

then I had to pass it as reference to a function that reads the input from cin and puts every inerted word into the AVL tree, with as value: the number of times that word has occured in the input text.

this is were it blocks.

inlees(test, avl_common);

inlees= read in function and test is a text document and avl_common is the AVL where we're gonna insert them into.

the function 'inlees' looks like this:

template <typename Key, typename Value>

int inlees (ifstream& path, AVLTree<Key, Value>& l);

_

but when compiling, it says: (using g++)

/tmp/ccW1N4R5.o: In function `main':
main.cc:(.text+ 0xdb): undefined reference to `int inlees<std::bas ic_string<char, std::char_trait s<char>, std::allocator< char> >, int>(std::basic _ifstream<char, std::char_trait s<char> >&, AVLTree<std::ba sic_string<char , std::char_trait s<char>, std::allocator< char> >, int>&)'


so it doesnt seem it can do the matching between Key and string AND Value and int.
can anyone tell me here my problem is?

thx you very much!!

[Ganon11]

Try calling the function using template parameters:

[CODE=cpp]inlees<std::str ing, int>(test, avl_common);[/CODE]

[weaknessforcats]

the function 'inlees' looks like this:

template <typename Key, typename Value>

int inlees (ifstream& path, AVLTree<Key, Value>& l);

I hope your function template doesn't look like this because this is not a valid template. That is, there's no function definition.

[pompom]

No, i copied that from the header file.

the thing is: i have an avl that supports templates.
and after defining a concrete AVL like:
AVLTree<std::st ring, int> avl_common;

I would like to pass it on to a read in function.
that 'inlees' function expects an AVL, but as it is not sure of what type its key and value will be, I've put 2 template type parameters there, Key and Value, like :

template <typename Key, typename Value>
int inlees (ifstream& path, AVLTree<Key, Value>& l) {
...

hoping, when calling that function, it will determine the Key and Value type of the defined avl-tree, here called avl_common.

But unfortunately, it seems it gives an error saying it cant find such function, eg it appearently cant do the matching between Key and string and Value and int.

[pompom]

ok I forgot to put em in the header file only, so now those errors are gone.
now i only get errors for the fact that it doenst seem the find the correct iterator for my
typename multimap<Key, Value>::iterato r i;

[weaknessforcats]

Maybe you could post that code.

[pompom]

got it to work 2 mins after i entered the previous post :-)

sorry for all the dumb mistakes :D thx all for your quick response