update_line.cpp

#include <iostream>     // For std::cout, std::flush, and std::endl
#include <chrono>       // For std::chrono::milliseconds
#include <thread>       // For std::this_thread::sleep_for

/** Update current line without putting the text on the next line
 *
 * This is done by using \r (carriage return) instead of \n
 */

int main(const int argc, char const* argv[]) {
    std::cout << "Using \\r to go back to the beginning of the line." << std::endl;
    std::cout << "Don't forget to std::flush" << std::endl;
    std::cout << "Here we go!!\r" << std::flush;

    // Wait for a bit
    std::this_thread::sleep_for(std::chrono::seconds(3));

    for (int i = 0; i < 10; i++) {
        // Erase current line
        std::cout << "\33[2K";
        std::cout << "Hello! " << i << "\r" << std::flush;
        // Wait for 500 ms
        std::this_thread::sleep_for(std::chrono::milliseconds(500));
    }

    std::cout << std::endl;
    std::cout << "Done" << std::endl;

    std::cout << "By not using carriage return," << std::endl;
    std::cout << "I can also do something like this!\r" << std::flush;

    // Wait for a bit
    std::this_thread::sleep_for(std::chrono::seconds(3));

    for (int i = 0; i < 20; i++) {
        std::cout << "\33[2K";
        std::cout << ">" <<std::flush;
        std::this_thread::sleep_for(std::chrono::milliseconds(250));
    }
    std::cout << "\33[2K\r";
    std::cout << "Done!" << std::endl;

    return 0;
}