Struct

MPI_TYPE_STRUCT(count, array_of_blocklengths, array_of_displacements,
                    array_of_types, newtype)
   IN        count                       number of blocks
   IN        array_of_blocklengths       number of elements per block
   IN        array_of_displacements      byte displacement for each block
   IN        oldtype                     type of elements in each block 
   OUT       newtype                     new datatype

MPI_Type_struct(int count, int *array_of_blocklengths, MPI_Aint *array_of_displacements, MPI_Datatype *array_of_types, MPI_Datatype *newtype)

MPI_TYPE_STRUCT(COUNT, ARRAY_OF_BLOCKLENGTHS, ARRAY_OF_DISPLACEMENTS, ARRAY_OF_TYPES, NEWTYPE, IERROR)INTEGER COUNT, ARRAY_OF_BLOCKLENGTHS(*), ARRAY_OF_DISPLACEMENTS(*), ARRAY_OF_TYPES(*), NEWTYPE, IERROR

MPI_TYPE_STRUCT is the most general type constructor. It further generalizes MPI_TYPE_HINDEXED in that it allows each block to consist of replications of different datatypes. The intent is to allow descriptions of arrays of structures, as a single datatype. The action of the Struct constructor is represented schematically in Figure .