Re: Lost in free format conversion. -- RPG400-L

Hi Armand,

Instead of using MOVE to pass the numeric field to alpha, use %char to
convert it to alpha.
This will convert a negative number correctly to alpha, like "-22256".
Then you can still use %int to convert it back.

Opcode MOVE simple moves bytes, it doesn't know about (negative) numbers.

Coincidentally (well not really), in EBCDIC a byte representing a character
"1" is the same as a byte representing a zoned numeric 1, which is hex F1.
So MOVE works coincidentally, with alpha fields and zoned numeric fields as
long as the number is positive. The "F" in F1 indicates it's "unsigned", a
"C" indicates it's positive and "D" indicates it's negative. The "sign" in
a zoned field is represented in the last byte (least significant). Thats
why you get the letter "O", which is hex D6, representing the digit 6 in a
negative number.

On Fri, Jan 25, 2013 at 11:04 AM, Armand Perquin <a.perquin@xxxxxxxxxxxxx>wrote:

Hello,

In a RPG3 program a numeric field is converted to a character field and
passed as parameter in a call. When this parameter is received in a free
format program and the value is positive there is no problem converting it
back to a numeric field. But when the value was negative the value in the
character field contains a letter so I can convert it to a numeric field
with %dec, %int or %uns.

E.g.
Field1 5.0 with value -22256 and parmField1 5A.

When the value from Field1 in RPG3 is moved into parmField1 the value is
converted from -22256 to '2225O'. In this case converting it back to a
numeric field is not possible because of the letter ‘O’. The result is
message RNX0105 is trown.

Can someone please help me to solve this challenge in free format.

Best Regards / Met vriendelijke groet,
Armand
_____________________________________________
H.P.J. (Armand) Perquin
AS/400 Senior software developer, Senior system analyst

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