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Home » Tip Bank » C++
Language: C++
Expertise: All
Jun 2, 2000

Integers With Platform-Independent Width

The newly approved C99 standard defines a new header file called < inttypes.h >, which defines sets of typedef names for integer types. One of these sets defines integer types having certain exact widths:

 
 int8_t     int16_t     int32_t     int64_t

And their exact-width unsigned counterparts are:

 
 uint8_t    uint16_t    uint32_t    uint64_t

The names are rather intuitive. For example, int8_t is a signed integral type that occupies exactly eight bits. Likewise, uint8_t is an unsigned integral type that occupies exactly eight bits. Use these typedef names when you need integers whose widths are identical on every platform.

Danny Kalev
 
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