Ed,
When you use text files (as in AFL), I beleive
you can not change contents. You can just add lines. (You might try replacing
the line with a blank and then re-write with desired contents - but am not
sure)
Suggest you change the format and add a
correction to the existing line. This is possible as long as you have not
closed the file or added a carriage return.
The new line could look like this:
SELL, 100, CHRW, STK, SMART, LMT, 52.44,
1,80,
where you have ordered 100 shares and got filled
on 80.
This would require to write each line in 2 write
operations
For statistical info this might be better, so you
know how often you get partial fills.
Ara
----- Original Message -----
Sent: Tuesday, June 12, 2007 5:38
AM
Subject: Re: [amibroker] fopen
read/write
hi Joe,
thanks for your reply. I have a basketfile with
lines like:
SELL, 100, CHRW, STK, SMART, LMT, 52.44,
1,
a whole bunch of lines like this one above I
send to the TWS. I wrote some code that checks if the number of shares
correspond to the number of shares I have in my portfolio at
IB.
So I want to be able to look at the number 100
in this example, compare it to the real number of shares I have and then
adjust the number 100 if necessary. I know I could open a second file
and use it to write to. I however want to use the same file and change
a number in that file if necessary. In C or C++ or any other language this
is possible. Since AFL uses more or less the C syntax I wondered if we could
do this in AFL as well,
rgds, Ed
----- Original Message -----
Sent: Tuesday, June 12, 2007 2:19
PM
Subject: Re: [amibroker] fopen
read/write
Ed, as I read your question literally, YES, one
can read, write and append to a file. Like so from the Users
Guide.
Simultaneously - NO. Programs
including AFL are serial.
Now if you mean you want to change some
elements or fields in that file, you'll have to read in the record of that file, change the field and write the
record back out.
HTH
Joe
>>>
fputs( string, filehandle )
RETURNS
NOTHING
FUNCTION Writes (puts) the string to the file.
The filehandle must be a number returned by fopen function used to
open the file.
The file has to be open for writing or appending ("w"
or "a") for this fputs to work.
----- Original Message -----
Sent: Tuesday, June 12, 2007 6:26
AM
Subject: [amibroker] fopen
read/write
hi,
anyone know if one can read + write to
a file. I need to read a file and change some numbers if necessary.
Seems that AFL can only read or write or append. In C or C++ it is
possible simultaneously. Anyone know how to do it in AFL?
thanks, Ed