// simple curses example; keeps drawing the inputted characters, in columns
// downward, shifting rightward when the last row is reached, and
// wrapping around when the rightmost column is reached
#include <curses.h> // required
int r,c, // current row and column (upper-left is (0,0))
nrows, // number of rows in window
ncols; // number of columns in window
void draw(char dc)
{
move(r,c); // curses call to move cursor to row r, column c
delch(); insch(dc); // curses calls to replace character under cursor by dc
refresh(); // curses call to update screen
r++; // go to next row
// check for need to shift right or wrap around
if (r == nrows)
{
r = 0;
c++;
if (c == ncols)
c = 0;
}
}
int main()
{
int i; char d;
WINDOW *wnd;
wnd = initscr(); // curses call to initialize window
cbreak(); // curses call to set no waiting for Enter key
noecho(); // curses call to set no echoing
getmaxyx(wnd,nrows,ncols); // curses call to find size of window
clear(); // curses call to clear screen, send cursor to position (0,0)
refresh(); // curses call to implement all changes since last refresh
r = 0; c = 0;
while (1)
{
d = getch(); // curses call to input from keyboard
if (d == 'q') break; // quit?
draw(d); // draw the character
}
endwin(); // curses call to restore the original window and leave
}