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C++ Template Class

Using a Template Class

C++ template class implements generic data structures.

Introduction to C++ Template Classes

C++ template classes are a powerful feature that allows developers to create generic data structures and functions. By using templates, you can write a single class or function that works with any data type, provided the operations used on the data type are supported. This feature is particularly useful for implementing data structures like lists, stacks, and queues in a type-safe manner.

Defining a Simple Template Class

To define a template class in C++, you use the template keyword followed by a template parameter list enclosed in angle brackets. Here's an example of a simple template class that represents a container for a single item of any type:

Using a Template Class

Once a template class is defined, you can create instances of the class using any data type. For example, you can create a container for integers, doubles, or strings as shown below:

Template Class with Multiple Parameters

C++ templates also support multiple parameters, allowing for even greater flexibility. Here's an example of a template class with two parameters:

Using a Template Class with Multiple Parameters

You can instantiate a template class with multiple parameters by specifying the types for each parameter. Here's how you can use the Pair class:

Benefits of Using Template Classes

  • Code Reusability: A single template class can be used with different data types without rewriting the class.
  • Type Safety: Templates provide compile-time type checking, reducing runtime errors.
  • Flexibility: Templates can handle multiple data types and operations through parameterization.

Examples