如何以类型定义的方式重新定义MPI_FLOAT、MPI_DOUBLE

#include <mpi.h>

int main(int argc, char** argv) {
    MPI_Init(&argc, &argv);

    // 定义新的数据类型
    MPI_Datatype new_float_type;
    MPI_Type_contiguous(1, MPI_FLOAT, &new_float_type);
    MPI_Type_commit(&new_float_type);

    MPI_Datatype new_double_type;
    MPI_Type_contiguous(1, MPI_DOUBLE, &new_double_type);
    MPI_Type_commit(&new_double_type);

    // 使用新的数据类型进行通信
    float float_data = 3.14;
    double double_data = 2.718;

    int rank;
    MPI_Comm_rank(MPI_COMM_WORLD, &rank);

    if (rank == 0) {
        MPI_Send(&float_data, 1, new_float_type, 1, 0, MPI_COMM_WORLD);
        MPI_Send(&double_data, 1, new_double_type, 1, 0, MPI_COMM_WORLD);
    } else if (rank == 1) {
        float received_float;
        double received_double;

        MPI_Recv(&received_float, 1, new_float_type, 0, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
        MPI_Recv(&received_double, 1, new_double_type, 0, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);

        // 处理接收到的数据
        // ...

        printf("Received float: %f\n", received_float);
        printf("Received double: %lf\n", received_double);
    }

    MPI_Type_free(&new_float_type);
    MPI_Type_free(&new_double_type);

    MPI_Finalize();
    return 0;
}