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C++ Programming Tutorials - class Templates Video Lecture | Learn to Program with C++: Beginner to Expert - Back-End Programming

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FAQs on C++ Programming Tutorials - class Templates Video Lecture - Learn to Program with C++: Beginner to Expert - Back-End Programming

1. What is a class template in C++?
A class template in C++ is a blueprint for creating objects of a specific class. It allows us to define a generic class that can work with different data types. The template parameters are used to specify the data types that will be used when creating objects from the template. By using class templates, we can write code that is more generic and reusable.
2. How do we define a class template in C++?
To define a class template in C++, we use the template keyword followed by the template parameter list, which specifies the data types that will be used in the template. The template parameter list is enclosed in angle brackets (<>) and can include one or more template parameters. For example: ``` template <typename T> class MyClass { // Class definition }; ``` In this example, `T` is the template parameter, which can be replaced with any data type when creating objects from the template.
3. How do we create objects from a class template in C++?
To create objects from a class template in C++, we need to specify the actual data types for the template parameters. We do this by providing the data types within angle brackets (<>) when declaring the object. For example: ``` MyClass<int> myObject; // Creates an object of MyClass with int as the template parameter ``` In this example, we are creating an object `myObject` of the class template `MyClass` with `int` as the template parameter. The object can now be used just like any other object of the class.
4. Can we have multiple template parameters in a class template?
Yes, we can have multiple template parameters in a class template in C++. The template parameters are separated by commas within the template parameter list. For example: ``` template <typename T, typename U> class MyTemplate { // Class definition }; ``` In this example, `T` and `U` are the template parameters. When creating objects from this template, we would need to provide two data types within angle brackets, corresponding to `T` and `U`.
5. Can we specialize a class template for a specific data type?
Yes, we can specialize a class template for a specific data type in C++. Template specialization allows us to provide a specific implementation for a template when a particular template argument is used. We can define a specialized version of the class template for a specific data type by using the `template<>` syntax. For example: ``` template <> class MyTemplate<int> { // Specialized definition for int }; ``` In this example, we are providing a specialized definition for the class template `MyTemplate` when `int` is used as the template argument. This specialized version will be used when creating objects from the template with `int` as the template parameter.
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