Epson RC170 Guia do Utilizador descarregar pdf (Página 174)

6. The SPEL+ Language

6.7.6 Arrays

You can declare local, module, and global arrays with up to three dimensions for all data

types.

To declare an array, use this syntax:

dataType name ( ubound1 [ , ubound2 [ , ubound3] ] )

SPEL

arrays are zero based. The first element is referenced with a value of zero.

The total available number of array elements for local and global preserve variables is 100

for strings and 1000 for all other types.

The total available number of array elements for global and module variables is 1000 for

strings and 10000 for all other types.

To calculate the total elements used in an array, use the following formula. (If a dimension

is not used, substitute 0 for the ubound value.)

total elements = (ubound1 + 1) * (ubound2 + 1) * (ubound3 + 1)

Array declaration examples:

' Global string array

Global String gData$(10)

Function main

' Arrays local to this function

Integer intArray(10)

Real coords(20, 10)

Use Redim to change the bounds of an array at run time.

Integer a(10)

Redim a(20)

To preserve values when using Redim, add the Preserve optional argument.

Integer a(10)

Redim Preserve a(20)

Use UBound to get the upper bound of an array dimension.

Integer i, a(10)

For i = 1 to UBound(a)

a(i) = i

Next i

6.7.7 Initial values

All variables are initialized when first used except for Global Preserve variables. Strings

are set to empty, and all other variables are set to zero.

6.7.8 Clearing arrays

Use Redim (without Preserve) to clear all of the elements of an array at run time.

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Epson RC170 Guia do Utilizador Página 174