check-in-meeting.md

CSE 142

Check-in Meeting

Week 8

1. Reference Mystery. Consider the following program.

   import java.util.*;
   
   public class ReferenceMystery {
       public static void main(String[] args) {
           int x = 3;
           int y = 6;
           int[] data = {3, 5, 7};
   
           y = mystery1(x, data);
           System.out.println(x + " " + Arrays.toString(data));
   
           mystery2(x, y);
           System.out.println(x + " " + y);
       }
   
       public static int mystery1(int x, int[] data) {
           x++;
           data[1] = 2 * x;
           System.out.println(x + " " + Arrays.toString(data));
           return data[0] + data[1];
       }
   
       public static void mystery2(int x, int y) {
           x = 2 * x;
           y++;
       }
   }

   List below the output produced by this program.

2. Write a static method called underline that takes a Scanner containing an input file as a parameter and that prints to System.out the same text with certain lines underlined. The lines to be underlined all begin with a period. The period should not be printed. You should print the text that follows the period on a line by itself followed by a line of dashes equal in length to the text that follows the period. For example, consider the following input:

   .Statement of Purpose
   I didn't expect to major in computer science until I took cse142.
   I liked it more than I expected and that got me hooked on cs.
   
   .High School Performance
   I got very good grades in high school, graduating in the top 10% of
   my class.
   
   .College Performance
   I have done well in my college classes, with an overall gpa of 3.5.
   

   If the text above is stored in a Scanner called input and we make this call:

   underline(input);

   the method should print the following output to System.out:

   Statement of Purpose
   --------------------
   I didn't expect to major in computer science until I took cse142.
   I liked it more than I expected and that got me hooked on cs.
   
   High School Performance
   -----------------------
   I got very good grades in high school, graduating in the top 10% of
   my class.
   
   College Performance
   -------------------
   I have done well in my college classes, with an overall gpa of 3.5.
   

   Notice that some of the input lines can be blank lines.

3. Write a method named stringLengths that takes an array of strings as a parameter and returns an array of integers whose elements are the lengths of the corresponding strings in the array parameter.

   For example, given the following arrays:

    String[] array1 = { "you", "say", "goodbye", "and", "i", "say", "hello" };
    String[] array2 = { "i", "love", "CSE", "142" };
    String[] array3 = { "thisisaverylongstring" };
    String[] array4 = { "strings", "strings", "everywhere" };

   Calling stringLengths will result in the following values:

   Call	Value Returned
   stringLengths(array1)	{3, 3, 7, 3, 1, 3, 5}
   stringLengths(array2)	{1, 4, 3, 3}
   stringLengths(array3)	{21}
   stringLengths(array4)	{7, 7, 10}