Damm algorithm: Difference between revisions
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112940 is not ok, check-digit should be 6 (instead of 0)</pre> |
112940 is not ok, check-digit should be 6 (instead of 0)</pre> |
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===static table=== |
=== static table === |
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Using a static table is over four times faster than manufacturing one. |
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<lang rexx>/*REXX pgm uses H. Michael Damm's algorithm to validate numbers with suffixed check sum.*/ |
<lang rexx>/*REXX pgm uses H. Michael Damm's algorithm to validate numbers with suffixed check sum.*/ |
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@.0= 0317598642; @.1= 7092154863; @.2= 4206871359; @.3= 1750983426; @.4= 6123045978 |
@.0= 0317598642; @.1= 7092154863; @.2= 4206871359; @.3= 1750983426; @.4= 6123045978 |
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