====== Fixed Width Integer Types And Compatibility Issues ======

C99 and current C++ version support some fixed width integer types like ''int64_t'' and ''uint64_t'',
and provide some associated, portable ''printf'' format specifiers like ''PRId64''.

The types are defined in ''<stdint.h>'', and the format specifiers are defined in ''<inttypes.h>'', which includes ''<stdint.h>''.

Some older build environments don't support these types, but provide some fixed width types
with proprietary names, and associated proprietary format specifiers to be used with ''printf'' and friends,
and possibly even provide ''<stdint.h>'' or ''<inttypes.h>'' files which aren't compatible with the C99 standard.

  * Here is an overview of the types, associated defines, and printf format specifiers:\\
    Fixed width integer types (since C++11)\\
    http://en.cppreference.com/w/cpp/types/integer

  * A general overview of fundamental C/C++ data types:\\
    Fundamental types\\
    http://en.cppreference.com/w/cpp/language/types

Older versions of Microsoft or Borland compilers don't support the C99 fixed with types

**Visual Studio 6:**

  * ''LONGLONG'' is ''<nowiki>__int64</nowiki>'' and uses ''I64{d|i|o|u|x|X}''
  * ''unsigned <nowiki>__int64</nowiki>'' is not fully supported by the runtime library

**Borland C++:**

  * ''LONGLONG'' is ''<nowiki>__int64</nowiki>'' and uses ''I64{d|i|o|x|X}'' or ''%Li''\\
  * ''ULONGLONG'' is ''unsigned <nowiki>__int64</nowiki>'' and uses ''I64{o|u|x|X}'' or ''%Lu''

''%L'' is specific to Borland, so ''%I64'' should be used preferably.

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 --- //[[martin.burnicki@burnicki.net|Martin Burnicki]] 2016-04-26 14:39//