read_write_single_scalar.cpp

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/*
 *  Copyright (c), 2017, Adrien Devresse
 *
 *  Distributed under the Boost Software License, Version 1.0.
 *    (See accompanying file LICENSE_1_0.txt or copy at
 *          http://www.boost.org/LICENSE_1_0.txt)
 *
 */
#include <iostream>
#include <string>
#include <vector>
 
#include <highfive/H5File.hpp>
#include <highfive/H5DataSet.hpp>
#include <highfive/H5DataSpace.hpp>
 
const std::string FILE_NAME("read_write_scalar.h5");
const std::string DATASET_NAME("single_scalar");
 
// Create a dataset name "single_scalar"
// which contains only the perfect integer number "42"
//
int main(void) {
    using namespace HighFive;
    try {
        // Create a new file using the default property lists.
        File file(FILE_NAME, File::ReadWrite | File::Create | File::Truncate);
 
        int perfect_number = 42;
 
        // Create the dataset
        DataSet dataset = file.createDataSet<double>(
            DATASET_NAME, DataSpace::From(perfect_number));
 
        // write it
        dataset.write(perfect_number);
 
        // flush everything
        file.flush();
 
        // let's read it back
        int potentially_perfect_number;
 
        dataset.read(potentially_perfect_number);
 
        std::cout << "perfect number: " << potentially_perfect_number
                  << std::endl;
 
    } catch (Exception& err) {
        // catch and print any HDF5 error
        std::cerr << err.what() << std::endl;
    }
 
    return 0; // successfully terminated
}