text: // The MIT License (MIT)
  //
  // Copyright (c) 2019 Luigi Pertoldi
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to
  // deal in the Software without restriction, including without limitation the
  // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  // sell copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  // IN THE SOFTWARE.
  //
  // ============================================================================
  //  ___   ___   ___   __    ___   ____  __   __   ___    __    ___
  // | |_) | |_) / / \ / /`_ | |_) | |_  ( (` ( (` | |_)  / /\  | |_)
  // |_|   |_| \ \_\_/ \_\_/ |_| \ |_|__ _)_) _)_) |_|_) /_/--\ |_| \_
  //
  // Very simple progress bar for c++ loops with internal running variable
  //
  // Author: Luigi Pertoldi
  // Created: 3 dic 2016
  //
  // Notes: The bar must be used when there's no other possible source of output
  //        inside the for loop
  //
  
  #ifndef __PROGRESSBAR_HPP
  #define __PROGRESSBAR_HPP
  
  #include <iostream>
  #include <string>
  #include <stdexcept>
  
  class progressbar {
  
      public:
        // default destructor
        ~progressbar()                             = default;
  
        // delete everything else
        progressbar           (progressbar const&) = delete;
        progressbar& operator=(progressbar const&) = delete;
        progressbar           (progressbar&&)      = delete;
        progressbar& operator=(progressbar&&)      = delete;
  
        // default constructor, must call set_niter later
        progressbar();
        progressbar(int n, bool showbar=true);
  
        // reset bar to use it again
        void reset();
       // set number of loop iterations
        void set_niter(int iter);
        // chose your style
        void set_done_char(const std::string& sym) {done_char = sym;}
        void set_todo_char(const std::string& sym) {todo_char = sym;}
        void set_opening_bracket_char(const std::string& sym) {opening_bracket_char = sym;}
        void set_closing_bracket_char(const std::string& sym) {closing_bracket_char = sym;}
        // to show only the percentage
        void show_bar(bool flag = true) {do_show_bar = flag;}
        // main function
        void update();
  
      private:
        int progress;
        int n_cycles;
        int last_perc;
        bool do_show_bar;
        bool update_is_called;
  
        std::string done_char;
        std::string todo_char;
        std::string opening_bracket_char;
        std::string closing_bracket_char;
  };
  
  #endif
  