Converting from HP Basic 5.0 into C++

[jesper3]

I'm writing code for GUI to control an Agilent analyzer. Now this analyzer is quite old so all of the code examples in the programming manual are all in HP Basic 5.0. I'm fairly new to C++ and am still trying to get my head around it all.
Below is the code I'm trying to decipher. I have a fairly good idea of whats going on I'm just not sure how it would translate in C++. The program is dumping an active trace in ASCII then loading that trace.

ASSIGN @Dsa TO 720

! Create REAL array for data
DIM Data_buffer(1:1668) 

! Dump data in ASCII format                     
OUTPUT @Dsa;"DDAS"

! Read format/length specifier
ENTER @Dsa;Specifier$
L=VAL (Specifier$[3])
PRINT "FORMAT SPECIFIER = ";Specifier$[1,2]
PRINT "LENGTH = ";L

! Read header and trace data
ENTER @Dsa;Data_buffer(*)


! Load data in ASCII format
OUTPUT @Dsa;"LDAS"

! Output format and length
OUTPUT @Dsa;Specifier$

! Output header and trace data
OUTPUT @Dsa;Data_buffer(*)

DDAS (dump data in ASCII) and LDAS (load data in ASCII) is syntax that belong to the Agilent analyzer. The first line of code is connecting to the device which I know how to do in C++.

Thanks