c++ 读取 hdf5文件，文件里包括info和data两种数据。info为字符串字典，data为两维数据

你可以使用HDF5 C++ API来读取HDF5文件中的数据。下面是一个简单的示例代码，可以读取HDF5文件中名为"info"和"data"的两个数据集：

#include <iostream>
#include <string>
#include "H5Cpp.h"

const std::string FILE_NAME("your_file_name.h5");
const std::string INFO_DATASET_NAME("info");
const std::string DATA_DATASET_NAME("data");

int main()
{
    // Open the HDF5 file
    H5::H5File file(FILE_NAME, H5F_ACC_RDONLY);

    // Read the "info" dataset
    H5::DataSet info_dataset = file.openDataSet(INFO_DATASET_NAME);
    H5::DataSpace info_dataspace = info_dataset.getSpace();

    // Get the number of elements in the dataset
    int info_size = info_dataspace.getSimpleExtentNpoints();

    // Allocate memory to hold the data
    char* info_buf = new char[info_size+1];

    // Read the data from the dataset into the memory buffer
    info_dataset.read(info_buf, H5::PredType::NATIVE_CHAR);

    // Null-terminate the string
    info_buf[info_size] = '\0';

    // Print the info string
    std::cout << "info: " << info_buf << std::endl;

    // Clean up the memory
    delete[] info_buf;

    // Read the "data" dataset
    H5::DataSet data_dataset = file.openDataSet(DATA_DATASET_NAME);
    H5::DataSpace data_dataspace = data_dataset.getSpace();

    // Get the dimensions of the dataset
    int ndims = data_dataspace.getSimpleExtentNdims();
    hsize_t dims[ndims];
    data_dataspace.getSimpleExtentDims(dims);

    // Allocate memory to hold the data
    double* data_buf = new double[dims[0]*dims[1]];

    // Define the hyperslab that we want to read
    hsize_t offset[2] = {0, 0};
    hsize_t count[2] = {dims[0], dims[1]};
    data_dataspace.selectHyperslab(H5S_SELECT_SET, count, offset);

    // Define the memory dataspace
    H5::DataSpace mem_dataspace(ndims, dims);

    // Read the data from the dataset into the memory buffer
    data_dataset.read(data_buf, H5::PredType::NATIVE_DOUBLE, mem_dataspace, data_dataspace);

    // Print the data
    std::cout << "data:" << std::endl;
    for (int i = 0; i < dims[0]; i++) {
        for (int j = 0; j < dims[1]; j++) {
            std::cout << data_buf[i*dims[1]+j] << " ";
        }
        std::cout << std::endl;
    }

    // Clean up the memory
    delete[] data_buf;

    return 0;
}

上述代码使用了H5Cpp.h头文件中定义的C++类来读取HDF5文件中的数据。首先，我们打开文件并读取"info"和"data"数据集。对于"info"数据集，我们直接将数据读取到一个char数组中，然后用cout输出即可。对于"data"数据集，我们需要手动定义一个内存缓冲区，并使用selectHyperslab方法来指定需要读取的数据范围。最后，我们将数据读取到内存缓冲区中，并输出到控制台。