A suggestion. In homework 1 you set up a system for being able to use VSC on you local machine to work with files on the lab machines. Use that system. In particular, create a new directory within the 245 directory you created in homework 1, presumably called something like "HW2".

Through this assignment you will be building a series of programs that hold, information about rocket launches. A description of the columns in this data is given in the following table.

id	type	description
year	integer	the year
month	integer	month 1==January, etc
day	integer	day of month. First day of month is 1
vehicle	string	the type of rocket
flight	String	A descriptor of the flight. Usually unintelligible.
launch site	string	The location of the rocket launch
launchpad	string	the place within the location
apogee	integer	max distance from earth
category	string	I am sure that this is meaningful, just not to me.

Throughout this assignment, all printing should be done using fmt.Printf rather than fmt.Println (or println). For the String() method (below) you must use fmt.Sprintf.

Part 1 -- Structs: 33%

• Define a set of structs that holds information about rocket launches as described above. The set must consist of at least two structs, one of which is used by the other.
• Use the structs you defined to store the following data.

  1968,01,16 , Voskhod 11A57 , Ya15002- 05    , NIIP-53    , 5         ,    441 , Sat
  1958,05,22 , Nike Cajun    , -              , WI         , 1         ,    240 , Balloon
  1983,01,14 , Kappa 9M      , K-9M-76        , KASC       , c         ,    349 , Aeron/Io
                                 

  Just hard code this data into your program. Store the instances of structs you created in 3 different variables (ie, a, b and c)
• Test if the three instances are equal to each other (I know that they aren't. Show that they are not programmatically.) You can do this with just ==.
• Create a copy of one of the instances. You can do this with just :=
• Test that copy has the same content as the original (it should). You should be able to use a simple equality test for this.
• Change the value of a field in the copy
• Are the original and the copy still equal? Would the original and copy still be equal if you were using Java?
• Write String methods for each struct. (String() methods in Go are equivalent to toString() in Java.) In your String method you must use fmt.Sprintf. Your string method should produce output similar to (but not identical) to "%+v"

Part 2 -- Slices: 33%

1968,01,16 , Voskhod 11A57 , Ya15002- 05    , NIIP-53    , 5         ,    441 , Sat
1958,05,22 , Nike Cajun    , -              , WI         , 1         ,    240 , Balloon
1983,01,14 , Kappa 9M      , K-9M-76        , KASC       , c         ,    349 , Aeron/Io
1966,08,25 , R-16U         , G 22603-13T    , NIIP-5     , o         ,   1210 , OT
2003,08,08 , Zenit-3SL     , SL10/DM-SL-10L , KLA        , c         ,  36090 , Sat
2012,09,12 , Terrier Lynx  , -              , WI         , c         ,    300 , Target
1978,12,19 , Proton-K/DM   , 295-02         , NIIP-5     , 2         ,  51018 , Sat
2018,10,11 , Sineva        , VMF RF         , BLA        , f         ,   1000 , OT

        

• Create a (sub)slice that has only the first 5 items. This should require one line of code
• Create a (sub)slice that has only the last 5 items. This should require one line of code.
• Create a slice that has the first 3 and the last 2 data items. This will likely require more than one line of code.

Part 3 -- Questions: 33%

1. From part 1: Explain your answer to "Are the original and the copy equal?" As a part of your explanation discuss how a copy of a struct differs from a similarly made copy of an object in Java?
2. From part 2: Consider the original slice and the slice with the first 5 items. Are the items in position 1 of the two slices equal (the answer should be yes)? If you change the value of a field in the struct in position 1 of the original slice, is it still equal to the item in position 1 of the second slice? Explain why the answer to this question makes sense with respect to your answer to the first question.

Electronic Submissions

Your submission will be handed in using the submit script.

If you write your program on computers other than those in the lab, be aware that your program will be graded based on how it runs on the department’s Linux server, not how it runs on your computer. The most likely problem is not submitting everything or hard coding file locations that are not correct on the Linux servers.

Make a README

The easiest place to write your readme is within VSC. Make a file just like a code file but name it README.txt (or just README) then just write in it. You should start by copying the sample readme. Put the README file into the HW2 directory.

Submit

These directions assume that you followed the suggestions above and have a directory named HW2 inside a 245 directory on the UNIX servers.

1. Open a terminal window on your computer (a windows powershell or a Mac terminal)
2. if it is still on your local machine, copy the PDF file of your report into the HW2 directory on the UNIX servers. To do so:
   1. first put the PDF (or test file) into the place where you are in the terminal (or switch the terminal to the place where the PDF file is).
   2. Second copy the file over to UNIX. I assume the pdf file is names "report2.pdf". To do this (assuming things from homework 1)

          scp report2.pdf lab186:245/HW2
      

   3. Use similar scp commands to get any other files from your local machine to the UNIX machines
3. When all of the files are in the HW2 directory and you are still in the 245 directory

       /home/gtowell/bin/submit  -c 245 -p 2 -d HW2
           

   This says to submit for project 2 (-p) everything in the directory HW2 (-d) for the class 245 (-c). You should see listing of all the files you submitted and a message that says "success".
4. You can submit multiple times. I will grade only the last submission -- unless you tell me otherwise. The submission process attaches a timestamp so I know when you submitted (down to the second). The closest submission I have ever received to the deadline is 7 seconds.

The submission should include the following items:

README:

This file should follow the format of this sample README

Source files

All of them

Question answers

If separate from readme.

Data files used:

Be sure to include any non-standard data files uses. (Rare)

DO NOT INCLUDE:

Data files that are read from the class site. Do include any of your own data files.

Again: Once you have everything you want to submit in the HW2 directory within /home/YOU/245/

1. Go to the directory /home/YOU/245
2. Enter /home/gtowell/bin/submit -c 245 -p 2 -d HW2