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int isdigit(<[c]>);
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int isdigit(<[c]>);
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DESCRIPTION
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DESCRIPTION
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<> is a macro which classifies ASCII integer values by table
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<> is a macro which classifies ASCII integer values by table
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lookup.  It is a predicate returning non-zero for decimal digits, and 0 for
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lookup.  It is a predicate returning non-zero for decimal digits, and 0 for
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other characters.  It is defined only when <>(<[c]>) is true
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other characters.  It is defined only if <[c]> is representable as an
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or <[c]> is EOF.
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unsigned char or if <[c]> is EOF.
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You can use a compiled subroutine instead of the macro definition by
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You can use a compiled subroutine instead of the macro definition by