Pascal: Const Array Of Const

Question

I am getting an 'Illegal Expression' error when creating a const char array of const chars.

Program Foo; (*excerpt*)
Const
  X : Char = 'X';
  O : Char = 'O';
  P : Array [1..2] of Char = (X,O);
Begin
  (*stuff*)
End.

Wouter van Nifterick · Accepted Answer · 2012-11-14 03:04:13Z

3

I'm typing this from a device that doesn't have pascal. So I can't verify it, but this probably works:

Const 
X = 'x';
O = 'o';
P : array[1..2] of char = (o,x);

answered Nov 14, 2012 at 3:04

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4 Comments

The language is case-insensitive. You wrote the same thing I already have.

No, i didn't specify the type of the constants, which makes a difference. Just try it, and let me know if it works.

Oh, got you. I actually did make X and O typeless before, but I wanted to know why giving them types causes an error.

Correct. This is because a typed constant is more like an initialzed var.

No'am Newman · Accepted Answer · 2012-11-21 13:28:43Z

2

You could also have written

Const
 X : Char = 'X';
 O : Char = 'O';
 P : Array [1..2] of Char = ('X', 'O');

to achieve the same effect

answered Nov 21, 2012 at 13:28

No'am Newman

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