How to delete printed characters from command line in C++

Question

I was downloading a compiler (I think it was MinGW but I\'m not sure) on windows 2000 the other day (I\'m generally a Mac user, but it wasn\'t my machine), and the downloade

Answer 1

I'm not sure why you ran into problems, but either \b or \r can be used to do this, I have used \b.

#include 
#include 
#include 
#include 

// This is the only non-portable part of this code.
// Simply pause for a specified number of milliseconds
// For Windows, we just call Sleep. For Linux, you'd
// probably call nanosleep instead (with a suitable
// multiplier, of course). Most other systems (presumably)
// have (at least vaguely) similar capabilities.
void pause(int ms) { 
    Sleep(ms);
}

static const int width = 40;    

void show_percent(int i) {
     int dashes = (width * i)/100;

     std::cout << '|' << std::left << std::setw(width) << std::string(dashes, '-') << '|' << std::setw(3) << i << "%";
}

int main() {

    for (int i=0; i<101; i++) {
        show_percent(i);
        std::cout << std::string(width+6, '\b');
        pause(100);
    }
}