How do I use templates in C++ functions?

How do I use templates in C++ functions?

You can define a template function by using the keyword 'template' followed by template parameters. For example:

template <typename T>
T add(T a, T b) {
    return a + b;
}

This allows the function to accept any data type.

Can you give me an example of using this template function?

Sure! You can call the add function like this:

int resultInt = add(5, 10); // Works with integers
double resultDouble = add(5.5, 2.5); // Works with doubles

The function will automatically deduce the type based on the arguments.

What if I want to use multiple types in one function?

You can use multiple template parameters. For example:

template <typename T, typename U>
auto add(T a, U b) -> decltype(a + b) {
    return a + b;
}

This allows you to add different types together.

Are there any limitations to using templates?

Yes, templates can lead to code bloat if overused, and they can also make error messages more complex. It's important to use them judiciously.