program t75_arrvar;

{ t75 -- variable ARRAY subscripts.

  CALC.INC:130 has `XPos[Count]' - a run-time index into a typed-constant
  array - and later `Sheet[FX,FY]'.  A CONSTANT index folds into boff; a
  run-time one is (i - lower) * elemsize from the base, and the element's
  address rides in DI, the same shape string subscripts use.  What is new is
  the WIDTH: an array element is one byte or two, not always a character.

  Covers a global Integer array, a global Byte array, a typed-constant array
  indexed by a Char, a LOCAL array, writes whose right-hand side also uses a
  subscript (DI must survive the parse), and reads used in expressions. }

type
   Letters = array ['A'..'C'] of Integer;
const
   X : Letters = (10, 20, 30);
var
   a : array [1..5] of Integer;
   b : array [1..5] of Byte;
   i : Integer;
   c : Char;

procedure Local;
var
   v : array [1..3] of Integer;
   k : Integer;
begin
   for k := 1 to 3 do
      v[k] := k * 5;
   writeln (v[2])
end;

begin
   for i := 1 to 5 do
      a[i] := i * 10;
   writeln (a[3]);
   i := 2;
   writeln (a[i]);
   a[i] := 99;
   writeln (a[2]);
   c := 'C';
   writeln (X[c]);
   for i := 1 to 3 do
      b[i] := i;
   writeln (b[2]);
   Local;
   b[2] := 7;
   a[3] := b[2] + 1;
   writeln (a[3])
end.