Passing array info to a procedure

[Lucas]

What is it you are trying to achieve?
I would like to do a procedure using data from a flexible array, but when i hit run it says "Compile time expression expected", and highlights "numpoints" in the line procedure transition (x, y : array 0 .. numpoints of real). All of the code i posted is in a module, not usre if that has anything to do with it. Anyway i can fix this?

Turing:

procedure transition (x, y : array 0 .. numpoints of real)         for decreasing : 100 .. 1             for i : 0 .. numpoints                 %%%%%%                 %%%%%%                 refresh (false)             end for         end for     end transition         % calculating stuff for the transition to XY view     procedure tooxy         if view not= "xy" then             for a : 0 .. numpoints                 if view = "zy" then                     dix (a) := (points (a).x - points (a).z) / 100                     diy (a) := 0                 elsif view = "zx" then                     dix (a) := (points (a).x - points (a).z) / 100                     diy (a) := (points (a).y - points (a).x) / 100                 elsif view = "3d" then                     dix (a) := (points (a).x - points (a).dx) / 100                     diy (a) := (points (a).y - points (a).dy) / 100                 end if             end for             transition (points.x, points.y)             view := "xy"         end if     end tooxy

Please specify what version of Turing you are using
4.1.1

[Tony]

Lucas @ Fri Mar 25, 2011 7:08 pm wrote:

when i hit run it says "Compile time expression expected", and highlights "numpoints"

The value of numpoints is not known at the runtime. You might want to read the docs on flexible for details.

[Lucas]

The value of numpoints at runtime is -1, i declare it earlier in the program. Or does that not make a difference?

[Tony]

Sorry, I meant to say "at compile time"

[Lucas]

Doesnt it just complie it when i hit "run"?

[Tony]

Yes, but we don't know how it compiles it. For all we know it just sees that it's not a constant, and decides that it doesn't want to deal with that.

[Lucas]

okay thx. anyway i can get around that?

[Tony]

Yes. Use constants or flexible arrays, instead of regular ones.

Tony @ Fri Mar 25, 2011 7:15 pm wrote:

You might want to read the docs on flexible for details.

[Lucas]

numpoints is a flexible array

[Tony]

RTFM

[Lucas]

1. My mistake, numpoints is a number value of the length of the flexible array.
2. All my arrays are flexible, except for
procedure transition (x, y : array 0 .. numpoints of real) , and when i made x, y, flexible array 0...numpoints of real i get a syntax error at flexible. I dont understand what you want me to use constants or flexible array is.
3. Yes, i followed your link, thx, and it says that the lower bounds must be known at compile time n stuff.
4. please, im new, and if u think that this is the stupidest message ever and that im a complete idiot, then by all means just dont answer

[Tony]

I was trying to lead you towards this bit in the documentation link posted above

Quote:

There is no flexible array parameter type, although a flexible array can be passed to an array parameter with "*" as the upper bound.

You should be able to say

code:

procedure transition (x, y : array 0 .. * of real)

[Lucas]

AHH! thank you