You can define your own data types with Type. User defined types in PlayBASIC are very similar to Structs in C or Records in Pascal and contain one or more Fields. A simple type definition would look like this:
Type TMyType
Field1
Field2#
Field3$
EndType
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This declares a user defined type called TMyType that contains three fields. An integer field called Field1, a float field called Field2# and a string field called Field3$. In order to use this type you need to delcare a variable with this type:
You can also delcare an array
Dim MyNewArray(10) As TMyType
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To access each defined type field of the new variable you type the variable name followed by a dot (.) and then the field name:
MyNewVar.Field1 = 42
MyNewVar.Field2# = 1.2345
MyNewVar.Field$ = "PlayBASIC"
MyNewArray(4).Field1 = 456
...
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Each field of a type can either be of a basic type (Integer, Float or String) or a previously user defined type:
Type TPoint
X
Y
EndType
Type TPlayer
Name$
Position As TPoint
Health
EndType
Dim MyPlayer As TPlayer
MyPlayer.Name$ = "Hero"
MyPlayer.Position.X = 12
MyPlayer.Position.Y = 200
MyPlayer.Health = 100
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PlayBASIC offers another feature called Inherited Types. That means that you can inherit the fields of a previously defined type in a new type.
Example:
Type TNameAge
Name$
Age
EndType
Type TAllDetails As TNameAge
Address$
FavouriteColour$
Weight#
EndType
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With As statement the type "TAllDetails" inherits all the fields of "TNameAge". Therefore the type "TAllDetails" has the following fields:
Name$
Age
Address$
FavouriteColour$
Weight#
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To learn more about Types please read the Types Tutorial
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