CODEWITHSUNDEEP
c++cbyteconstantsbit
Brans Ds
Brans Ds

Reputation: 4117

Is there a constant something like bits_in_byte (8)?

Is there in C/C++ standart constant that reflects how many bits are there in one byte (8)? Something like CHAR_BIT but for byte.

Upvotes: 5

Views: 4637

Answers (2)

Michał Jaroń
Michał Jaroń

Reputation: 624

The sizeof() operator is consistent with CHAR_BIT constant defined in <climits> header, see the Notes section: https://en.cppreference.com/w/cpp/language/sizeof

Depending on the computer architecture, a byte may consist of 8 or more bits, the exact number being recorded in CHAR_BIT.

Above documentation defines the byte and its bits count.

Also some implementations of std::bitset use CHAR_BIT to obtain bits per byte.

Upvotes: 1

jotik
jotik

Reputation: 17900

According to the C standard, a char is one byte. Therefore CHAR_BIT is the number of bits in a byte.

The C standard says that CHAR_BIT is "number of bits for smallest object that is not a bit-field (byte)".

Upvotes: 11

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