(Replacing switch with if…else)Rewrite the program of Fig. by replacing the switch stateme...

(Replacing switch with if…else)Rewrite the program of Fig. by replacing the switch statement with a nested if…else statement; be careful to deal with the default case properly. Then rewrite this new version by replacing the nested if…else statement with a series of if statements; here, too, be careful to deal with the default case properly (this is more difficult than in the nested if…else version). This exercise demonstrates that switch is a convenience and that any switch statement can be written with only single-selection statements.

Figure Counting letter grades with switch.