On the MSVC++ compiler, one can use the
ISO standard C, starting with the C99 standard, adds the standard header
<stdint.h> that defines these:
uint8_t - unsigned 8 bit int8_t - signed 8 bit uint16_t - unsigned 16 bit int16_t - signed 16 bit uint32_t - unsigned 32 bit int32_t - signed 32 bit uint64_t - unsigned 64 bit int64_t - signed 64 bit
I use these types all the time.
These types are defined only if the implementation supports predefined types with the appropriate sizes and characteristics (which most do).
<stdint.h> also defines types with names of the form
(u)int_leastN_t (types that have at least the specified width) and
(u)int_fastN_t (the "fastest" types that have at least the specified width); these types are mandatory.
If you're using an old implementation that doesn't support
<stdint.h>, you can roll your own; one implementation is Doug Gwyn's "q8".