Make Utility Classwork: Work individually on the following tasks.

Before You Start:

- Command-Line Shell: Use "Bash" (Git for Windows) or "Terminal" (Mac).
- Text Editor: Use "Notepad++" or your preferred editor.
- Windows Users Only: Install the "make" command. 
  See class webpage > "Start here" > "Only for Windows users"
- Access to Linux/Unix Commands Sheet: Unix Commands PDF.
http://www.cs.utexas.edu/~fares/cs330ef25/CS%20373_files/tutorials/UnixCommands.pdf


Tasks:

1. Create a Python File:

Name: "Avg.py"
Content:

def avg(marks):
    assert len(marks) != 0
    return sum(marks)/len(marks)

print("The average of 1, 2, and 3 is", avg([1,2,3]))

- Note: Type the code manually instead of copying and pasting.

2. Run the Python File:

- Command: "$ python Avg.py"
- Expected Output: "The average of 1, 2, and 3 is 2.0"
  
3. Redirect Output to a File:

- Command: "$ python Avg.py > Output.txt"
- Question 1: What is the difference between the output of steps 2 and 3?

4. Delete Output File:

- Command: "$ rm Output.txt"

Note: This ensures your next make run shows the effect clearly
5. Verify Deletion:

- Command: $ ls
- Question 2: Do you see "Output.txt" listed? 

6. Create a Makefile:

- In the same directory as Avg.py, create a file named makefile with the  
following content:

Output.txt:
    @echo "Creating Output.txt"
    python Avg.py > Output.txt

- Question 3: Identify the target, dependencies, and actions in this make rule.

7. Run Make Command:

- Command: "$ make Output.txt"
- Question 4: What do you see as output?

8. List Files:

- Command: "$ ls"
- Question 5: Do you see "Output.txt"?

9. Re-run Make Command: Notice how make behaves differently depending on whether files are new, deleted, or updated
- Command: "$ make Output.txt"
- Question 6: What do you see as output? Why?

10. Delete Output File Again:

- Command: "$ rm Output.txt"

11. Verify Deletion Again:

- Command: "$ ls"

12. Update Makefile:

- Add "Avg.py" as a dependency:

Output.txt: Avg.py
    @echo "Creating Output.txt"
    python Avg.py > Output.txt

13. Run Make Command with Updated Makefile:

- Command: "$ make Output.txt"
- Question 7: What do you see the output displayed on the monitor?

Note: "$" just represents the shell prompt. don’t type the $ itself.

14. Re-run Make Command Again:

- Command: $ make Output.txt
- Question 8: What do you see as output? Why?

15. Modify Python File:

- Open "Avg.py", add a comment or print statement, and save the file.

16. Re-run Make Command After Modification:

- Command: "$ make Output.txt"
- Question 9: What do you see as output? Why?