Can a pointer be null and if so can it be tested for?

Projects Programming
2

Dyslexicbloke:
Can a pointer be set null...

Yes.

MyPtr = NULL;

...and then tested for?

Yes.

if ( MyPtr == NULL )
{
// Do your thing.
}

The other possibility is to use "pass by reference"...

boolean GetThePointer( int* & MyPtr )
{
  if ( NameIsFound )
  {
    MyPtr = PointerToStruct;
    return( true );
  }
  else
  {
    MyPtr = NULL;
    return( false );
  }
}

void loop( void )
{
  int* MyPtr;

  if ( GetThePointer( MyPtr ) )
  {
    // Do your thing.
  }
}