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GeoBASIC Reference Manual 2.GeoBasic Constructs
2-14 TPS1100-Version 1.30
TYPE DIM StringArrayType ( 35 ) AS String*10 END
TYPE DIM ArrayArrayType
( 5 ) AS DoubleArrayType END
The last example shows that arrays can be nested: the five elements of
ArrayArrayType
are arrays itself. But there is also a direct way of
declaring multidimensional arrays.
TYPE DIM MatrixType ( 5 , 20 ) AS Angle END
A variable of
MatrixType
will denote a 5 by 20 matrix of angles (floating
point).
♦
In closing let us compare the access to elements of the two multidimensional
arrays.
DIM ArrayArray AS ArrayArrayType
DIM Matrix
AS MatrixType
ArrayArray(1)( 1) = 1.0
ArrayArray(1)(20) = 20.0
ArrayArray(5)(20) = 100.0
Matrix( 1, 1 ) = 1.0
Matrix( 1, 20 ) = 20.0
Matrix( 5, 20 ) = 100.0
2.2.4 Declaration of Structures
A structure (a structured type, also known as a "record" in other languages)
consists of a number of values of possibly
different types and is declared as
follows:
Syntax:
TypeDeclaration ::= " TYPE " Name
{ ElementName "
AS
"
DataTypeName }
" END " [ Name ]
•
A variable of type "Name" will consist of elements (fields, components) which
can be accessed by their element name as given in the type declaration (see
Section 2.4 on Variables).