check-in-meeting.md

CSE 142

Check-in Meeting

Week 7

General Items

• Check homework
• How did the midterm go?
• Is there anything that we should have practiced more together? Anything that you were surprised to see on the midterm?
• Have you started A6?
• Reminders about academic honesty
• Are there any things I should stop doing or start doing to better support you?

Problems

1. Consider the following method, mystery.

public static void mystery(int[] a, int[] b) {
    for (int i = 0; i < a.length; i++) {
        a[i] += b[b.length - 1 - i];
    }
}

What are the values of the elements in array a1 after the following code executes?

int[] a1 = {1, 3, 5, 7, 9};
int[] a2 = {1, 4, 9, 16, 25};
mystery(a1, a2);

2. Consider the following method, mystery.

public static void mystery2(int[] a, int[] b) {
    for (int i = 0; i < a.length; i++) {
        a[i] = a[2 * i % a.length] - b[3 * i % b.length];
    }
}

What are the values of the elements in array a1 after the following code executes?

int[] a1 = {2, 4, 6, 8, 10, 12, 14, 16};
int[] a2 = {1, 1, 2, 3, 5, 8, 13, 21};
mystery2(a1, a2);

3. Write a method called wordWrap that accepts a Scanner representing an input file as its parameter and outputs each line of the file to the console, word-wrapping all lines that are longer than 60 characters. For example, if a line contains 112 characters, the method should replace it with two lines: one containing the first 60 characters and another containing the final 52 characters. A line containing 217 characters should be wrapped into four lines: three of length 60 and a final line of length 37.