array/types

BlitzMax Forums/BlitzMax Beginners Area/array/types

twistedcube

(Posted 2005) [#1]

Since I am converting my list over to arrays. I was wondering can you set an array to a type such as this:

type test
Field a:Int
Field b:Int
End Type

Ttest:test[10,10]

can could you access it buy doing the following:
print Ttest[1,1].a

now when I put an item into the array it doesn't do what I expect.

Ttest[1,1].a=2

makes every single a field 2. Is there some way for me to have this kinda of access, do I just have the syntax wrong?

Thanks in advance

PowerPC603

(Posted 2005) [#2]

If you create an array of types, you only create an array which can hold references to type-instances.
At each index, you need to use the NEW statement to create a new type-instance and put the pointer to that instance at the specified index.

Type test
	Field a:Int
	Field b:Int
End Type

' Create an array which can hold pointers to "test"-type-instances
' The indexes don't have a value yet, as you've not yet created any instances
local Ttest:test[10,10]


' Create instances for each index of the array and put their pointer inside the array
For i = 0 to 9
	For j = 0 to 9
		Ttest[i,j] = New test
	Next
Next

Print Ttest[1,1].a ' Should print "0", because an int field is initialised as "0"

Ttest[1,1].a=2 ' Set value
Print Ttest[1,1].a ' Print previously set value (should print "2")

twistedcube

(Posted 2005) [#3]

WOw thanks for the speedy responce. Still working on getting my head around the type-instances. But I think I understand how it works now.

Thanks

TwistedCube