CS256 - Fundamentals of Structured Programming

Displaying exercises/e8/solution/p5.c

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

/**
 * Use this function to get a random integer between a and b inclusive.
 * ex: R(0,10) -> a random number between 0 and 10
 */
int R(int a, int b)
{
  int d = (a < b? b-a : a-b) + 1;
  return a + (rand()%d);
}

/**
 * make a loop to read a character using getch() and for each character read,
 * print "Hello, world!" at a random location using the R() function defined
 * above. The y value should range between 0 and LINES-1 and the x value between
 * 0 and COLS-10.  When a 'q' or 'Q' is read by getch() you should exit the
 * loop and then the program.
 */
int main(void)
{
  int ch;

  initscr();

  clear();

  while((ch = getch()) != ERR) {
    if (ch == 'q' || ch == 'Q') break;
    mvprintw(R(0,LINES-1), R(0,COLS-10), "Hello, world!");
    refresh();
  }

  endwin();
  return 0;
}