Passing arrays in B4PPC6?

[Frank]

Hi there,
the backward compatibility issue list of B4PPC6 says "Arrays cannot be passed and returned from subs.".
Thus my prgram fails when trying to do "optimized compilation".

Is there any way to work around this?

Below see the code that fails - actually taken from the demo app "GPS4PPC".
When compiling the app, I receive an error "CS0266: Cannot implicitly convert type 'object' to 'string'..." on the line where it says "return res()".

Is there anything I can do except of declaring these variables global?

Thanks,
Frank


Sub Distance_Course (lat1,lon1,lat2,lon2)
ErrorLabel(Distance_CourseErr)
lat1 = lat1 * cPI / 180
lon1 = -lon1 * cPI / 180
lat2 = lat2 * cPI / 180
lon2 = -lon2 * cPI / 180
d = 2 * ASin(Sqrt((Sin((lat1-lat2)/2))^2 + Cos(lat1)*Cos(lat2)*(Sin((lon1-lon2)/2))^2))
res.Distance = d * 180 * 60 /cPI
If Cos(lat1) < 1e-7 Then
If (lat1 > 0) Then
tc1 = cpi
Else
tc1= 2*cpi
End If
Else
sn = Sin(lon2-lon1)
If Abs(sn) < 1e-7 Then
If lat1 > lat2 Then tc1 = cpi Else tc1 = 2*cpi
Else If sn < 0 Then
tc1=ACos((Sin(lat2)-Sin(lat1)*Cos(d))/(Sin(d)*Cos(lat1)))
Else
tc1=2*cpi-ACos((Sin(lat2)-Sin(lat1)*Cos(d))/(Sin(d)*Cos(lat1)))
End If
End If
res.Course = tc1 * 180 / cPI
Return res()
Distance_CourseErr:
res.Distance = 0
res.Course = 0
Return res()
End Sub

 

[Erel]

You can download the updated source code.

You to pass the arrays using global variables instead of the subs parameters.
Instead of:

SomeArray() = Distance_Course(...)

You should write:

Distance_Course(...)
SomeArray() = res()