pointers

[peterworth]

is it possible to manually increment a pointer to get the next element in memory? if so, how much should it be incremented by to get the next integer in a series of integers in memory?

 

[towerbase]

Assuming you mean a series of integers to be an array of integers then the following example code might be of help.

var
  i: integer;
  ints: array [ 0.. 15 ] of integer;
  ip: ^integer;  // Pointer to an integer
begin
// Fill array with predictable numbers
  for i := Low(ints) to High(ints) do
    ints[i] := i + 100;

  ip := @ints;  // Point to first array element
  ShowMessage ( IntToStr ( ip^ ) );
  inc ( ip, sizeof(integer) );  // Point to next element
  ShowMessage ( IntToStr ( ip^ ) );
end;

Note that actual value to be incremented is best avoided by using the sizeof() function. This makes the code more robust (anticipating 64 bit integers?) and portable.


Andrew
Hampshire, UK