How do I use templates and arrays in C++?

How do I use templates and arrays in C++?

Templates in C++ allow you to create functions and classes that work with any data type. Arrays are collections of elements of the same type. You can combine them by creating a template function that operates on arrays.

Can you give me an example of a template function for an array?

Sure! Here's a simple example:

template <typename T>
void printArray(T arr[], int size) {
    for (int i = 0; i < size; i++) {
        std::cout << arr[i] << ' ';
    }
    std::cout << std::endl;
}

This function prints elements of an array of any type.

What about using templates with multi-dimensional arrays?

You can use templates with multi-dimensional arrays as well. Here's an example for a 2D array:

template <typename T>
void print2DArray(T arr[][COLS], int rows) {
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < COLS; j++) {
            std::cout << arr[i][j] << ' ';
        }
        std::cout << std::endl;
    }
}

Just replace COLS with the number of columns.

Are there any limitations when using templates with arrays?

Yes, one limitation is that the size of the array must be known at compile time for static arrays. Dynamic arrays can be managed using pointers and the new keyword.