Field type string and I

Hi,
I have a data :
data:quantite_typeI type I.
data:quantite_typeC type string.
i have a data : var_remise1 type ZKBETR.
but when i'm doing this code to change : var_remise1 to a strin :
quantite_typeC = var_remise1.
quantite_typeI = quantite_typeC.
When i have var_remise1 = -0.25 ( value < 1 ) i have quantite_typeC = 0 and quantite_typeI = 0.
when i have var_remise1 = -1 or -2... that's work.
I don't understand why i have a problem with value <1.
Thanks for your reply.

Oh sorry, a mistake.
quantite_typeC = var_remise1. ---> ook i have 0.25-
quantite_typeI = quantite_typeC. -
error i have 0
quantite_typeC = quantite_typeI.----> error i have 0 and not 0.25-

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check the below links u will get the answers for your questions
http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3860358411d1829f0000e829fbfe/content.htm
http://www.sts.tu-harburg.de/teaching/sap_r3/ABAP4/field_sy.htm
http://searchsap.techtarget.com/tip/1,289483,sid21_gci920484,00.html
Syntax Diagram
FIELD-SYMBOLS
Basic form
FIELD-SYMBOLS <fs>.
Extras:
1. ... TYPE type
2. ... TYPE REF TO cif
3. ... TYPE REF TO DATA
4. ... TYPE LINE OF type
5. ... LIKE s
6. ... LIKE LINE OF s
7. ... TYPE tabkind
8. ... STRUCTURE s DEFAULT wa
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Effect
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You can only use one of the additions.
Example
Output aircraft type from the table SFLIGHT using a field symbol:
FIELD-SYMBOLS <PT> TYPE ANY.
DATA SFLIGHT_WA TYPE SFLIGHT.
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Addition 1
... TYPE type
Addition 2
... TYPE REF TO cif
Addition 3
... TYPE REF TO DATA
Addition 4
... TYPE LINE OF type
Addition 5
... LIKE s
Addition 6
... LIKE LINE OF s
Addition 7
... TYPE tabkind
Effect
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This addition is not allowed in an ABAP Objects context. See Cannot Use Obsolete Casting for FIELD SYMBOLS.
In some cases, the syntax rules that apply to Unicode programs are different than those for non-Unicode programs. See Defining Types Using STRUCTURE.
Effect
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Example
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DATA SBOOK_WA LIKE SBOOK.
FIELD-SYMBOLS <SB> STRUCTURE SBOOK
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Related
ASSIGN, DATA
Additional help
Declaring Field Symbols
FIELD GROUPS
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we use EXTRACT statement, HEADER structure in them
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How to Guide
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/40574601-ec97-2910-3cba-a0fdc10f4dce
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check here
http://help.sap.com/saphelp_nw04/helpdata/en/e3/94007075cae04f930cc4c034e411e1/content.htm
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