Thread: How to point correctly?

How do I make ptr_1 pointing to the same address of ptr_2 after function_B is called? I tried doing this, but after function_B exits, ptr_1 points back to NULL. Thanks!

Code:

void cluster::function_A(void)
{
	int *ptr_1, *ptr_2;
	ptr_1 = NULL;
	ptr_2 = new int [ 10 ];
	function_B(ptr_1, ptr_2);

}

void cluster::function_B(int *ptr_1, int *ptr_2)
{
	ptr_1 = ptr_2;
}