very easy templates tutorial?
Author
some time ago I asked a question about 2 linked lists and how I could use the functions (which are the same for both linked lists) for both lists. Some of you answered I should use templates and now I tried but failed. Can someone show me a very small example or give me the link to a very simple tutorial about them?
I know I could also use the std::list (or something similar) but I see this as the opportunity to become familiar with this template stuff...
write the class using the data type T with the template declaration before it
then just fill in the T when instanciate the class and if youve writin it correctly it should work.
Just Be carefull about making assumptions about T
T t;
t = t * 6; UH OH CAN T BE MULTIPLIED !!!!!
template< class T >struct ListNode{ ListNode<T> * next; ListNode<T> * prev; T data;};template < class T >class List { T GetFrontData() { return head->data; } T GetBackData() { return tail->data; }private: ListNode<T> * head; ListNode<T> * tail; }; then just fill in the T when instanciate the class and if youve writin it correctly it should work.
Just Be carefull about making assumptions about T
T t;
t = t * 6; UH OH CAN T BE MULTIPLIED !!!!!
Author
thx, that looks like a small example :)
I think I need to make a very small console test program to play around with it for a while and get familiar until I try to implement this into my stuff...
I think I need to make a very small console test program to play around with it for a while and get familiar until I try to implement this into my stuff...
Here's a quick little tutorial on templates. It is fairly useful, but you are right about playing around with it first. Templates can be the devil!
- Drew
- Drew
Author
Quote:Original post by Drew_Benton
Here's a quick little tutorial on templates. It is fairly useful, but you are right about playing around with it first. Templates can be the devil!
- Drew
Thanks for the word of warning... I read through your devil-thread and now I'm asking myself: wtf is a xpp or tpp file? Is it just a file which you include but you call it tpp because you have all the templates in it?
Oh yea, it's just a another name for a file. Like it is just a common practice to use .cpp and .h and .c for your files. You can use like: #include "myheader.abc" - the compiler doesn't care what it's called, just wether or not it can find it.
As for your source files, they work in a similar way. However, in most IDEs like VS, .cpp is automatically compiled, so if you use something else, you will have to make sure it is compiled as a source file. Like if you add a .txt, it will not be compiled as a source file.
Take a look at another old (and dumb) post of mine to see a good use for using alternative names [smile]
As for your source files, they work in a similar way. However, in most IDEs like VS, .cpp is automatically compiled, so if you use something else, you will have to make sure it is compiled as a source file. Like if you add a .txt, it will not be compiled as a source file.
Take a look at another old (and dumb) post of mine to see a good use for using alternative names [smile]
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