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Class templates in c++ with simple example ppt:
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But aside from that it's free. The same problem would occur for a set, which has 3 template arguments. Template is simple and yet very powerful tool in C++. If a pointer variable stores the address of a char variable , we call it a character pointer and so on.
There is truly something for everyone. We want it to work for any container, and we also want the user to type as little as possible, so we don't want to act on iterators. C++ provides two elements of templates: class templates and function templates. It sees perfectly well all the invocations of the function throughout the program, and all the possible argument types it gets passed types are, after all, resolved at compile-time in C++. Not a very easy task, since the code has been met in many places. Variadic templates for the rescue: template class ContainerTypetypename ValueTypetypename. It's different from the ones already shown in the article, because it doesn't really use the traditional recursive approach of implementing variadic templates.
<p>Note that this is a compile-time template metaprogramming construct - it acts on constants and types, not on runtime objects. One of its uses can be to check if a parameter passed to a member function is the object itself. In such cases you can define a specialization of the template for that particular type. So with each call, the parameter pack gets shorter by one parameter.</p><br>
<p>A program may require a queue of customers and a queue of messages. One could easily implement a queue of customers, then take the existing code and implement a queue of messages. The program grows, and now there is a need for a queue of orders. So just take the queue of messages and convert