7.18.1.1 Exact-width integer types

1

The typedef name intN_t designates a signed integer type with width N , no padding bits, and a two’s complement representation. Thus, int8_t denotes a signed integer type with a width of exactly 8 bits.

2

The typedef name uintN_t designates an unsigned integer type with width N . Thus, uint24_t denotes an unsigned integer type with a width of exactly 24 bits.

3

These types are optional. However, if an implementation provides integer types with widths of 8, 16, 32, or 64 bits, no padding bits, and (for the signed types) that have a two’s complement representation, it shall define the corresponding typedef names.