progress_bar_example.cpp

// File: progress_bar_example.cpp
// Modified from https://stackoverflow.com/questions/14539867/how-to-display-a-progress-indicator-in-pure-c-c-cout-printf
// Compile with:
//  g++ -std=c++14 -o prog progress_bar_example.cpp -Werror -pedantic
#include <iostream>
#include <chrono> // for literals
#include <thread> // for cross-platform sleep

int main()
{
    using namespace std::chrono_literals;
    float progress = 0.0;
    const int bar_width = 50;
    while (progress <= 1.0) {
        std::cout << '[';
        int pos = bar_width * progress;
        for (int i = 0; i < bar_width; ++i) {
            if (i < pos) std::cout << '=';
            else if (i == pos) std::cout << '>';
            else std::cout << ' ';
        }
        std::cout << "] " << static_cast<int> (progress * 100.0) << "% \r";
        std::this_thread::sleep_for(500ms); // Cross-platform sleep
        std::cout.flush(); // Must manually flush or else output won't appear.

        progress += 0.20; // To simulate progress. Can change number to whatever you want.
    }
    std::cout << std::endl; // Newline before printing new things.

    return 0;
}