Dynamic Memory Allocation deleting pointer!

[jakvrh1]

Is this correct way freeing memory?

#include <iostream>
#include <string>
#include <ctime>
#include <cstdlib>

using namespace std;

const int size = 10;
int main()
{
	srand(time(NULL));
	int *pointerArray = new int[size];
	
	for (int i = 0; i < size; i++)
	{
		pointerArray[i] = rand() % 100;
		cout << pointerArray[i] << endl;
	}
	
	delete[] pointerArray;
	pointerArray = NULL;

	system("pause");
	return 0;
}

[Chervil]

That looks ok.
new should be matched with delete

new [] should be matched with delete []

The setting of the pointer to NULL (or nullptr in C++11) is often good practice, as it avoids having a dangling pointer which seems to point to a valid address, but doesn't.

[jakvrh1]

As long as I type delete [] pointerArray, it will delete whole array. I mean I dont have to type for example; for loop , delete [i] pointerArray; ? Right?

[Chervil]

As long as I type delete [] pointerArray, it will delete whole array.

Yes.

I mean I dont have to type for example; for loop , delete [i] pointerArray; ? Right?

Right. you don't have to do that.

Your original code uses the new [] operator precisely one time, so you need delete [] precisely once too.

You didn't use new for each element, so you don't need to use delete for each element.

[jakvrh1]

Thank you for your replay, I appreciate it!