check-in-meeting.md

CSE 142

Check-in Meeting

Week 3

Expressions

1. 8 + 6 * -2 + 4 + "0" + (2 + 5)
2. 1 + 1 + "8 - 2" + (8 - 2) + 1 + 1

Parameter Mystery

1. Given the code below, what will the output be?

public class MysteryTouch {
  public static void main(String [] args) {
    String head = "shoulders";
    String knees = "toes";
    String elbow = "head";
    String eye = "eyes and ears";
    String ear = "eye";

    touch(ear, elbow);
    touch(head, "elbow");
    touch(head, "knees " + knees);
 }

 public static void touch(String elbow, String ear) {
    System.out.println("touch your " + elbow + " to your " + ear);
 }

2. Given the code below, what will the output be?

public class MysteryTouch {
  public static void main(String [] args) {
    String head = "shoulders";
    String knees = "toes";
    String elbow = "head";
    String eye = "eyes and ears";
    String ear = "eye";

    touch(elbow, ear);
    touch(knees, "Toes");
    touch(eye, eye);
 }

 public static void touch(String elbow, String ear) {
    System.out.println("touch your " + elbow + " to your " + ear);
 }

Programming

1. Write a method named lastDigit that returns the last digit of an integer. For example, lastDigit(3572) should return 2. It should work for negative numbers as well. For example, lastDigit(-947) should return 7.

2. Write a method called printPowersOfN that accepts a base and an exponent as arguments and prints each power of the base from base0 (1) up to that maximum power, inclusive. For example, consider the following calls:

printPowersOfN(4, 3);
printPowersOfN(5, 6);
printPowersOfN(-2, 8);

These calls should produce the following output:

1 4 16 64
1 5 25 125 625 3125 15625
1 -2 4 -8 16 -32 64 -128 256