Allocating A Large (5000+) Array

Question

I am working on an application were there are three possible sizes for the data entered:

• small: 1000 elements
• medium= 5000 elements
• large= 50

Answer 1

You can allocate such a big array on the heap:

int *arr;
arr = malloc (sizeof(int) * 500000);

Don't forget to check that allocation succeded (if not - malloc returns NULL).

And as pmg mentioned - since this array is not located in the stack, you have to free it once you finished working with it.