A simple example to use whole terminal screen in C (same as python example but in C language).

c_curses_example.c

#include <ncurses.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
/*
 *  https://gist.github.com/adam-sas-on/
*/


void rand_range(int *col, int *row, const int width, const int height){
	double rnd;

	if(col != NULL){
		rnd = (double)rand()/(1. + RAND_MAX);// [0.0, 1.0);
		*col = (int)floor(rnd*width);
	}

	if(row != NULL){
		rnd = (double)rand()/(1. + RAND_MAX);// [0.0, 1.0);
		*row = (int)floor(rnd*height);
	}
}

void run(){
	int c, row = 3, col = 0, run = 1, height, width;
	const int row_begin = 3;

	srand((unsigned)time(NULL));

	initscr();
	raw();
	keypad(stdscr, TRUE);
	noecho();


	mvprintw(0, 4, "Random point on a board");
	mvprintw(1, 3, "Press any key for the next point");
	mvprintw(2, 3, "or ENTER for exit");


	while(run){
		getmaxyx(stdscr, height, width);
		width -= 3;
		height -= row_begin;

		mvprintw(row, col, "   ");

		rand_range(&col, &row, width, height);
		row += row_begin;
		mvprintw(row, col, "xxx");


		c = getch();


		if(c == '\n' || c == KEY_ENTER || c == KEY_EXIT)
			run = 0;
	}

	endwin();
}

int main(int ac, char**av, char**env){
  run();

  return 0;
}

// gcc c_curses_example.c -lm -lncurses