gcc curhello.c -lcurses

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <curses.h>

int main(void) {
    WINDOW * mainwin;

    if ( (mainwin = initscr()) == NULL ) {
	fprintf(stderr, "Error initialising ncurses.\n");
	exit(EXIT_FAILURE);
    }
    mvaddstr(13, 33, "Hello, world!");
    refresh();
    sleep(3);
    delwin(mainwin);
    endwin();
    refresh();

    return EXIT_SUCCESS;
}