Lesson 17 - Template Classes in C++

In the previous lesson, Abstract classes and interfaces in C++, we went over abstract classes. In today's C++ tutorial, we're going to look at template classes. We've already met templates in the templates lesson. We already know that templates allow us to create generic functionality, independent of the data type, which we don't specify until the template is used. Using templates in OOP is almost identical, therefore we're going to rather get into the syntax quickly and then try to program a resizable array, but this time in pure OOP.

Template Classes

As with template functions, we first add the template keyword before declaring the class, along with the parameters to replace the types with. This is followed by the classic class declaration where the template parameter can be used instead of a specific data type. As with the functions, the entire declaration must be placed in the .h file. You can read why in the previous lesson. However, this doesn't mean we can't separate the class declaration and its implementation. It only means that both the declaration and the implementation must be in the header file.

If we separate the implementation, we must add the template keyword


 

...End of the preview...

Premium article

Premium article

ict.social is a large database made up of manuals and tutorials, whose main goal is to provide high-quality IT education to everyone. We started out in the Czech republic, where we display roughly a million articles per month and receive plenty of gratitude from our users. Thanks to our successful establishment, we are now bringing these articles to the rest of the world.

Although we are trying to keep our content free of charge, maintaining the site is a huge effort for everyone involved. Therefore, some content (exercises and more advanced material) costs network points. Don't worry, they're really cheap :)

Article description

Requested article covers this content:

We'll show you how to declare template classes in C++ and how we can use them.

Limited offer: Learn all knowledge and save money

Buy articles and tests separately one by one 160 points
Buy the course including all articles and features for an exclusive price 136 points
Currently, you have 0 points
By buying this exclusive package, you'll have access to all 25 articles in this course including exercise submitting while saving $2.16. This offer is limited for the first articles only with an additional exclusive 15% discount.
You gain 136 points for adding an article to the site, or for $14.40 $12.24

Buy just this article

Warning, by buying just this article you'll lose the limited 15% discount for the package of all the articles.

To access the article, you need 10 points
Currently, you have 0 points
You gain 10 points for adding an article to the site, or for $0.90

Buying this article gives you unlimited access to it forever. You will learn some more and help us keep giving our site maintenance which helps you and others get better futures. It's a win-win.

This article is licensed :Premium, by buying this article, you agree with the terms of use.

You gain points by supporting our network. This is done by sending a helpful amount of money to support the site, or by creating content for the network.

You can get points immediately using:

Credit card SMS Wire transfer
Credit card SMS Wire transfer

 

Activities (3)