cout according to terminal size

[KiritoVsHalt]

I want to print something like this: "help().............................................Display this help message." to the terminal window.
How can I make it adjust the amount of periods to fit the terminal window dynamically?

[Peter87]

There's no standard way of doing it.

On Linux you can use ioctl to get the terminal width.

#include <iostream>
#include <iomanip>
#include <sys/ioctl.h>
#include <unistd.h>

int main()
{
	winsize w;
	ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
	std::cout << std::left << std::setw(w.ws_col) << std::setfill('.') << "help()";
}