carriage return and overwriting a line

carriage_return_and_overwriting_a_line.cpp

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

// 行を上書きして更新するサンプル
int main()
{
    std::cout << "Hello" << std::endl;

    for(int i = 0; i < 25; ++i) {
        std::cout << "\r" << "                     " << "\r" << i << " : " << std::sqrt(i) << std::flush;
        //std::cout << "\r" << (char)27 << "[2K" << i << " : " << std::sqrt(i) << std::flush;
        std::this_thread::sleep_for(std::chrono::seconds(1));
    }

    std::cout << std::endl;
}