Function Help

Blitz3D Forums/Blitz3D Beginners Area/Function Help

Kirkkaf13

(Posted 2010) [#1]

Hi everyone,

Since I am new to Blitz and programming in general, I have only created basic user functions.

I have a function with variable X for example how can I share this varible with another function and return the value to the original function without making the variable global?

Thanks in advance.

OneHitWonder

AJ00200

(Posted 2010) [#2]

You may need to correct it a bit. It has been a long time since I've used Blitz:

Function afunction()
      x=7
      y=function2(x)
End Function
Function function2(x);<---------
      return x+1;x comes from ^
End Function

Matty

(Posted 2010) [#3]

Similar to AJ00200 -


Function MyFunction()

x = 123
;some statements...
;
;
;
x=AnotherFunction(x)

End Function 

Function AnotherFunction(myParameter)

myParameter = ;...some equation

return myParameter

End Function

Note that if you want to return a string then the function needs to be declared as follows:

Function MyFunction$()
'the $ after the function name indicates this function will return a string

End Function

If you want to return a floating point number then the function needs to be declared as follows:

Function MyFloatFunction#()
;the # after the function name indicates a floating point number will be returned
end function

If you want to return a type instance then do as follows:

Type MyType
;field a$,b$ ;etc
;field x,y,z, etc

End Type

Function MyFunction.MyType(parameter)
;eg

MyTypeInstance.MyType=new MyType
;MyTypeInstance\x = 123 ;etc

return MyTypeInstance.MyType
;return null - if you don't want to return an instance
End Function

;if you want to pass a type then do the following:

Type MyType
;field a$,b$ ;etc
;field x,y,z, etc

End Type

Function MyFunction(parameter.MyType)

;parameter\x = 123 ; 



End Function

Note also that unlike standard variables (string, integer, float) which are passed by value, type instances are passed by reference.

stanrol

(Posted 2010) [#4]

this answers it no need for me.