delta_y            70 usr/sample/balls/balls.c 	int delta_x, delta_y;
delta_y            79 usr/sample/balls/balls.c 	delta_y = (random() % 10) + 1;
delta_y            96 usr/sample/balls/balls.c 		y += delta_y;
delta_y           100 usr/sample/balls/balls.c 			delta_y = -delta_y;