Exercise 6

This exercise reviews the flow of execution through a program

with multiple methods. Read the following code and answer the questions.

public class Buzz {

public static void baffle(String blimp) {

System.out.println(blimp);

zippo("ping", -5);

}

public static void zippo(String quince, int flag) {

if (flag < 0) {

System.out.println(quince + " zoop");

} else {

System.out.println("ik");

baffle(quince);

System.out.println("boo-wa-ha-ha");

}

}

public static void main(String[] args) {

zippo("rattle", 13);

}

}

1. Write the number 1 next to the first line of code in this program that

will execute.

2. Write the number 2 next to the second line of code, and so on until the

end of the program. If a line is executed more than once, it might end

up with more than one number next to it.

3. What is the value of the parameter blimp when baffle gets invoked?

4. What is the output of this program?

Exercise 2

For the following program:

1. Draw a stack diagram that shows the state of the program the second

time ping is invoked.

2. What is the complete output?

public static void zoop(String fred, int bob) {

System.out.println(fred);

if (bob == 5) {

ping("not ");

} else {

System.out.println("!");

}

}

public static void main(String[] args) {

int bizz = 5;

int buzz = 2;

zoop("just for", bizz);

clink(2 * buzz);

}

public static void clink(int fork) {

System.out.print("It's ");

zoop("breakfast ", fork);

}

public static void ping(String strangStrung) {

System.out.println("any " + strangStrung + "more ");

}

Exercise 3

Draw a stack diagram that shows the state of the program in

Section 5.8 after main invokes nLines with the parameter n == 4, just before

the last invocation of nLines returns.