[Info-vax] VAX BASIC global variables.

[Arne Vajhøj]

On 10/15/2021 12:09 PM, E Thump wrote:
> On Friday, October 15, 2021 at 4:44:49 PM UTC+1, Jeffrey H. Coffield
> wrote:
>> COMMON (MY_DATA) INTEGER a,b

>> sub adder (integer c,integer d)

> Next question to do with arrays. Instead of doing DIM Z(10) it seems
> I should do COMMON (MY_DATA) INTEGER Z(10) and then use that exact
> same line within the sub. The 10 and everything has to match. Am I on
> the right lines there?

Yes.

Declarations *should* match.

They are not strictly required to, but it becomes
pretty messy if they don't.

This does not look good:

program hack
common (mydata) long a(2)
call s
print a(0),a(1)
end program

sub s
common (mydata) word a(4)
a(0) = 1
a(1) = 1
a(2) = 2
a(3) = 2
end sub


Arne