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2 Regular Expressions Write a regular expression that is similar to the regular expression used to describe hexadecimal numeric constants in C . These are

2 Regular Expressions
Write a regular expression that is similar to the regular expression used to describe hexadecimal numeric constants in C. These are hexadecimal integers,
or hexadecimal floating-point values. A hexadecimal integer begins with 0x
or 0X, and may contain the digits 0-9 and a/A-f/F. A hexadecimal floatingpoint value has an optional fractional portion and a mandatory exponent
(beginning with P or p). In hexadecimal, there may be digits to the left of
the dot, the right of the dot, or both, and the exponent itself is given in
decimal, with an optional leading + or - sign. An integer may end with an
optional U or u (indicating unsigned), and/or L or l (indicating long)
or LL or ll (indicating long long). A floating-point value may end with
an optional F or f (indicating float single precision) or L or l (indicating
long double precision).2 Regular Expressions
Write a regular expression that is similar to the regular expression used to de-
scribe hexadecimal numeric constants in C. These are hexadecimal integers,
or hexadecimal floating-point values. A hexadecimal integer begins with 0x
or 0x, and may contain the digits 0-9 and a/A-f/F. A hexadecimal floating-
point value has an optional fractional portion and a mandatory exponent
(beginning with P or p). In hexadecimal, there may be digits to the left of
the dot, the right of the dot, or both, and the exponent itself is given in
decimal, with an optional leading + or - sign. An integer may end with an
optional U or u (indicating "unsigned"), and/or L or l (indicating "long")
or LL or ll (indicating "long long"). A floating-point value may end with
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