How is an array of unknown length defined in the C language?

In the C language, we can use pointers to define arrays of unknown length. The specific steps are as follows:

1. pointer to an integer array
2. Allocate memory
3. Allocate memory for an array of integers with size n.
4. I don’t want to go to the party because I don’t like the people who will be there.
5. Set the first element of the array to 1.
6. release the memory
7. release the memory allocated for the array.

It is important to note that after using dynamically allocated arrays, you must remember to release the memory, otherwise it may lead to memory leak issues.