(Closest-pair animation) Write a program that enables the user to add/remove points by clicking the left/right mouse button, and displays a line that connects the pair of nearest points, as shown in Figure 22.4

 (Closest-pair animation) Write a program that enables the user to add/remove points by clicking the left/right mouse button, and displays a line that connects the pair of nearest points, as shown in Figure 22.4.

FIGURE 22.4 The closet-pair animation draws a line to connect the closest pair of points dynamically as points are added and removed interactively.