Example: system_progress_bar

C++ example source code:

/*                    _
                     | |    Mobile Robot Programming Toolkit (MRPT)
 _ __ ___  _ __ _ __ | |_
| '_ ` _ \| '__| '_ \| __|          https://www.mrpt.org/
| | | | | | |  | |_) | |_
|_| |_| |_|_|  | .__/ \__|     https://github.com/MRPT/mrpt/
               | |
               |_|

 Copyright (c) 2005-2025, Individual contributors, see AUTHORS file
 See: https://www.mrpt.org/Authors - All rights reserved.
 SPDX-License-Identifier: BSD-3-Clause
*/


#include <mrpt/core/exceptions.h>
#include <mrpt/system/progress.h>

#include <chrono>
#include <iostream>
#include <thread>

void TestProgressBar()
{
  const int end = 400;
  const size_t barWidth = 30;

  for (int i = 0; i <= end; i++)
  {
    double p = double(i) / end;

    std::cout << "Progress: " << mrpt::system::progress(p, barWidth)
              << mrpt::format(" %5.02f%%", 100 * p) << "\r";
    std::cout.flush();
    std::this_thread::sleep_for(std::chrono::milliseconds(5));
  }
  std::cout << std::endl;
}


int main()
{
  try
  {
    TestProgressBar();
    return 0;
  }
  catch (const std::exception& e)
  {
    std::cerr << mrpt::exception_to_str(e) << std::endl;
    return -1;
  }
}