modify freeRam() to find fragmentation

Using Arduino Programming Questions
19

Thomas499:
Both preferably. But I figured out how to print what it points to, I need to figure out how to print the pointer.
I tried that before I asked on here. The youtube examples do it this way too. But I get this error message

void setup()
{
  Serial.begin(115200);
  int a = 45;
  Serial.println((unsigned long)&a);
}

void loop()
{
}

Compiles, at least.