Re: [amibroker] fopen read/write

["Edward Pottasch" <empottasch@xxxxxxxxx>]

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 -----

From: Joe Landry

To: amibroker@xxxxxxxxxxxxxxx

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 -----

From: Edward Pottasch

To: amibroker@xxxxxxxxxps.com

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 

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