struct st_Data
{
    int nWRank;
    int nSRank;
    char cName[160];
    int nData;
};

MPI_Aint offsets[] = {(MPI_Aint)offsetof(struct st_Data, nWRank), (MPI_Aint)offsetof(struct st_Data, nSRank), (MPI_Aint)offsetof(struct st_Data, cName), (MPI_Aint)offsetof(struct st_Data, nData)};
MPI_Datatype types[] = {MPI_INT, MPI_INT, MPI_CHAR, MPI_INT};
int blockcounts[] = {1, 1, 160, 1};
MPI_Datatype myMPI_Data;
MPI_Type_struct(4, blockcounts, offsets, types, &myMPI_Data);
MPI_Type_commit(&myMPI_Data);

struct st_Data
{
    int nWRank;
    int nSRank;
    char cName[160];
    int *nData;
};