// poc.c
#include <stdio.h>
#include <windows.h>
int main(void) {
    CONSOLE_SCREEN_BUFFER_INFO csbi;
    GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi);
    int width = csbi.srWindow.Right - csbi.srWindow.Left + 1;
    int height = csbi.srWindow.Bottom - csbi.srWindow.Top + 1;
    char f[height][width];
    memset(f, ' ', height * width);
    f[height / 2][width / 2] = '*';
    while(1) {
        puts(*f);
    }
}