How do I use templates in C++ classes?

How do I use templates in C++ classes?

Using templates in C++ classes allows you to create a class that can operate with any data type. You define a template class using the template keyword followed by template parameters. For example:

template <typename T>
class MyClass {
public:
    T value;
    MyClass(T val) : value(val) {}
    T getValue() { return value; }
};

This class can now be instantiated with any data type.

Can you give me an example of how to instantiate this template class?

Sure! You can instantiate the MyClass template with different data types like this:

MyClass<int> intObj(5);
MyClass<double> doubleObj(3.14);
MyClass<std::string> stringObj("Hello");

Each object will have its own type and can use the getValue() method to retrieve the stored value.

What are the benefits of using templates in classes?

Templates promote code reusability and type safety. You can write a single class definition that works with any data type, reducing code duplication and making your codebase cleaner.

Are there any limitations to using templates?

Yes, some limitations include increased compilation time and potential code bloat, as each instantiation generates separate code. Additionally, debugging template errors can be more complex.