4.15.3. Unsigned long long Type
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A new type, MPI_UNSIGNED_LONG_LONG in C and MPI::UNSIGNED_LONG_LONG in C++ is added as an optional datatype.
[] Rationale.
The ISO C9X committee has voted to include long long
and unsigned long long as standard C types.
( End of rationale.)
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MPI-2.0 of July 18, 1997
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