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--- cubloc:array_and_constants:index [2020/02/03 10:48]
COMFILE Technology
+++ cubloc:array_and_constants:index [2023/07/06 05:28]
COMFILE Technology [Arrays]
@@ Line 1: / Line 1: @@
+====== Arrays ======
+Cubloc BASIC supports arrays of up to 2 dimensions. Each dimension can contain up to 999 items. String Array doen't supported.
+<code xbasic>
+Dim A(20) As Byte           ' Declare an array of 20 Bytes
+Dim B(200) As Integer       ' Declare an array of 200 Integers
+Dim C(200) As Long          ' Declare an array of 200 Longs
+Dim D(20,10) As Single      ' 2-dimensional Single array (20 x 10)
+Dim ST1(10) As String * 12  ' Caution : String array doen't support
+</code>
+{{ :cubloc:array_and_constants:array.png?nolink |}}
+Be sure to make note of how much memory is used when using multidimensional arrays.
+<code xbasic>
+Dim D(20,10) As Single       ' 4 * 10 * 20 = 800 Bytes of Data Memory
+</code>
+----
+====== Constants ======
+Constants can be used to declare a constant value (a value that cannot be
+changed) within the program. This essentially allows a number to be
+assigned a name, often improving readability and debugging of the source code.
+The CONST statement can be used to declare constants in Cubloc BASIC:
+<code xbasic>
+Const PI As Single = 3.14159
+Const WRTTIME As Byte = 10
+Const MSG1 As String = "ACCESS PORT"
+</code>
+When the constant is not given a type, the compiler will find an appropriate
+type for it as shown below:
+<code xbasic>
+Const PI = 3.14159         ' Declare as SINGLE
+Const WRTTIME = 10         ' Declare as Byte
+Const MYROOM = 310         ' Declare as Integer since it’s over 255.
+Const MSG1 = "ACCESS PORT" ' Declare as String
+</code>
+====== Constant Arrays ======
+In constant arrays, the user is able to store a list of values before the
+program begins. A program requiring a large number of constant values
+can be simplified as shown below:
+<code xbasic>
+Const Byte DATA1 = (31, 25, 102, 34, 1, 0, 0, 0, 0, 0, 65, 64, 34)
+I = 0
+A = DATA1(I)         ' Store 31 in A.
+I = I + 1
+A = DATA1(I)        ' Store 25 in A.
+Const Byte DATA1 = ("CUBLOC SYSTEMS")
+</code>
+String data can be stored in Byte constant arrays. Each Byte contains the
+ASCII code of each character in the String. In the example above, If
+DATA1(0) is read, the ASCII code of 'C’ is returned. Likewise if DATA1(1) is
+read, ASCII code of 'U’ is returned.
+Integer and floating point (Single) numbers can also be stored in arrays
+as shown below:
+<code xbasic>
+Const Integer DATA1 = (6000, 3000, 65500, 0, 3200)
+Const Long DATA2 = (12345678, 356789, 165500, 0, 0)
+Const Single DATA3 = (3.14, 0.12345, 1.5443, 0.0, 32.0)
+</code>
+For multiple-line constant arrays, end each line with a comma, or an
+underscore character as shown :
+)
+<code xbasic>
+Const Byte DATA1 = (31, 25, 102, 34, 1, 0, 0, 0, 0, 0, 65, 64, 34,
+, 123, 94, 200, 0, 123, 44, 39, 120, 239,
+, 13, 34, 20, 101, 123, 44, 39, 12, 39)
+</code>
+)
+<code xbasic>
+Const Byte DATA2 = (31, 25, 102, 34, 1, 0, 65, 64, 34_
+                   , 101, 123, 44, 39, 12, 39)
+</code>
+String constant arrays are deprecated.
+Please make note of the following differences between arrays and constant arrays.
+^ ^Array ^Constant Array^
+|Storage Location |Data Memory (SRAM) |Program Memory (FLASH)|
+|When Allocated |During Program run |During Download|
+|Can be Changed |Yes |No|
+|Purpose |Store changing values |Store constant values|
+|When Powered Off|Lost |Ratained |
+{{ :cubloc:array_and_constants:array_demo.png?nolink |}}
+[[cubloc:index:|Go CUBLOC home]]

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