c++ - Get size of terminal window (rows/columns)

Question

Is there any reliable way of getting the number of columns/rows of the current output terminal window?

I want to retrieve these numbers in a C/C++ program.

I'm looking for a GNU/Linux solution primarily, but also need a Windows solution.

Answer 1

On Windows, use the following code to print the size of the console window (borrowed from here):

#include <windows.h>

int main(int argc, char *argv[]) 
{
    CONSOLE_SCREEN_BUFFER_INFO csbi;
    int columns, rows;

    GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi);
    columns = csbi.srWindow.Right - csbi.srWindow.Left + 1;
    rows = csbi.srWindow.Bottom - csbi.srWindow.Top + 1;

    printf("columns: %d
", columns);
    printf("rows: %d
", rows);
    return 0;
}

---

On Linux, use the following instead (borrowed from here):

#include <sys/ioctl.h>
#include <stdio.h>
#include <unistd.h>

int main (int argc, char **argv)
{
    struct winsize w;
    ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);

    printf ("lines %d
", w.ws_row);
    printf ("columns %d
", w.ws_col);
    return 0;  // make sure your main returns int
}