Question

I need to remove a specific element from an array, that array is dynamically resized in order to store an unknown number of elements with realloc.

To control the allocated memory and defined elements, I have two other variables:

double *arr = NULL;
int elements = 0;
int allocated = 0;

After some elements being placed in the array, I may need to remove some of them. All texts that I’ve found says to use memmove and reduce the variables by the number of elements removed.

My doubt is if this method is secure and efficient.

Answer 1

I think this is the most efficient function you can use (memcpy is not an option) regarding secured – you will need to make sure that the parameters are OK, otherwise bad things will happen 🙂