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(short for character) is a data type with size one byte, but unlike the de facto size of byte as 8 bits, this use of byte is less specific. Byte is defined to be large enough to contain any member of the "basic execution character set". The number of bits used by a compiler is accessible via the macro. By far the most common size is 8 bits, and POSIX requires it to be 8 bits. In modern C standards, is required to

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