text:  
  //snippet-sourcedescription:[describe_volumes.cpp demonstrates how to retrieve information about the Amazon Elastic Block Store volumes attached to an Amazon EC2 instance.]
  //snippet-keyword:[C++]
  //snippet-keyword:[Code Sample]
  //snippet-keyword:[Amazon Elastic Block Store]
  //snippet-service:[ebs]
  //snippet-sourcetype:[full-example]
  //snippet-sourcedate:[]
  //snippet-sourceauthor:[tapasweni-pathak]
  
  
  /*
     Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
     This file is licensed under the Apache License, Version 2.0 (the "License").
     You may not use this file except in compliance with the License. A copy of
     the License is located at
      http://aws.amazon.com/apache2.0/
     This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
     CONDITIONS OF ANY KIND, either express or implied. See the License for the
     specific language governing permissions and limitations under the License.
  */
  
  #include <aws/core/Aws.h>
  #include <aws/ec2/EC2Client.h>
  #include <aws/ec2/model/DescribeVolumesRequest.h>
  #include <aws/ec2/model/DescribeVolumesResponse.h>
  #include <iostream>
  
  int main(int argc, char ** argv)
  {
    if (argc != 1)
    {
      std::cout << "Usage: describe_volumes" << std::endl;
      return 1;
    }
  
    Aws::SDKOptions options;
    Aws::InitAPI(options);
    {
      Aws::EC2::EC2Client ec2;
  
      Aws::EC2::Model::DescribeVolumesRequest dv_req;
  
      auto dv_out = ec2.DescribeVolumes(dv_req);
  
      if (dv_out.IsSuccess())
      {
        std::cout << "Successfully describing volumes as:";
        for (auto val: dv_out.GetResult().GetVolumes())
        {
          std::cout << " " << val.GetVolumeId();
        }
        std::cout << std::endl;
      }
      else
      {
        std::cout << "Error describing volumes" << dv_out.GetError().GetMessage()
          << std::endl;
      }
    }
  
    Aws::ShutdownAPI(options);
    return 0;
  }
  