How to define an empty array in the C language?

In C language, you can define an empty array using the following method:

1. Defining an empty array using pointers: You can declare a pointer variable and initialize it to NULL, indicating that the pointer is pointing to an empty array.

int *arr = NULL;

1. Defining an empty array using a static array: You can declare a static array and set its length to 0 to indicate that the array is empty.

int arr[0];

It is important to note that defining an empty array does not allow for direct operations on the array because it has no elements. Before using the array, memory space needs to be allocated for the array and initialized as a non-empty array.