I am trying to automatically generate PPM P5 files.
In order to write the binary part of the files, I am using
put_code/1
It says that accepts non negative integer numbers. My aim is to
produce greyscale images so I need to write numbers that represent
the grey level. Of course, numbers go from 0 to 255.
That's the problem.
put_code(1)
up to
put_code(255)
work;
but
put_code(0)
does not.
I get
ERROR:Exception error(representation_error(character_code),put_code/1)
occurred while evaluating the query " put_code(0) ".
Please, give me a suggestion or an alternative solution for this problem.
Thanks in advance
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Massimo De Gregorio
Research Scientist
Istituto di Cibernetica "Eduardo Caianiello" - CNR
Via Campi Flegrei 34
Comprensorio "A. Olivetti" - Ed. 70
80078 Pozzuoli (NA) - ITALIA
Tel. (+ 39) 0818675151
Fax: (+ 39) 0818675158
Skype: massimo.de.gregorio
E-mail: [email protected]
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