Modify Programming Exercise 22.21 to display the intermediate results of the search. Figure 32.32 gives a snapshot of an animation in progress with number 2 placed in the cell in Figure 32.32a, number 3 placed
in the cell in Figure 32.32b, and number 3 placed in the cell in Figure 32.32c. The animation displays all the search steps.

Data from Programming Exercise 22.21

The complete solution for the Sudoku problem is given in Supplement VI.C. Write a program that lets the user enter the input from the text fields, as shown in Figure 22.21a. Clicking the Solve button displays the
result, as shown in Figures 22.21b and c.

E Exercise32_20 Exercise32_20 Exercise32_20 5 3 1 2 7 4 2 6 19 5 5 3 1 5 312 74 6 19 5 27 6 19 5 9 8 6 9 8 9 8 6 Solve Clea Solve Clear Solve Clear (a) (b) (c)