CSCI 102 - Intro to Computer Science LAB

Week 03 Python Assignment
Due by Tuesday, September 14th, 2021
        Part A: Twitter Decoding (must (1) demo during class (2) upload to Gradescope by 11:45pm)
        Part B: Enhanced Calculator (due to Gradescope by 11:45pm)

Part A: Twitter Decoding (3 points)

• When prompting for input, use the prompt string WORD>, where WORD is a single, uppercase word which describes the input. For example, this lab might choose: TWEET> .
• When providing output that will be graded, start the line with the word OUTPUT followed by exactly one space, e.g. OUTPUT . Think of this as "boxing your answer" on a math worksheet; it lets us quickly find your answer. Gradescope will skip any output lines that do not start with OUTPUT.
• You are welcome to have other output lines that do not begin with OUTPUT; Gradescope will ignore these.
• A submission without exactly correct output formatting will receive an AUTOMATIC ZERO. This is because Gradescope is automated—it does not look at your code, only the results, and thus the format of the results must be consistent for all students.

Comments

All Python files should include a header with your name, section, assignment info, references (i.e., who did you collaborate with on this assignment?; what resource did you use?), and approximate time taken to do the assignment. Be sure to cite any allowed external references used to complete the assignment. Any code without this header will lose 1 point. Here's an example:
        #   Tracy Camp
        #   ​CSCI 102 – Section A
        #   Week 3 - Lab A - Twitter Decoding
        #   References: TA Abi for if syntax
        #   Time: 20 minutes

Part B Assignment: Enhanced Calculator (3 points)

To get started, open IDLE and then create a New File via the File menu. We suggest you immediately save this file in the directory managing all your 102 Python Labs this semester. Please save this file with the following name: Week3B-enhanced_calculator.py.

Consider our Simple Calculator from Week 2 - Part A, which asks the user for two real numbers, calculates four operations, and outputs the result. In this lab, your program should only complete a single operation (i.e., an operation chosen by the user).

1. Declare operand_one and operand_two variables, initializing each to 0.0.
2. Declare the variables sum, difference, product, quotient and remainder, and initialize each to 0.0.
3. Prompt the user to input a real number as the first operand, assigning it to your operand_one variable.
4. Prompt the user to input a real number as the second operand, assigning it to your operand_two variable.
5. Ask the user which operation they would like to have performed.
6. Calculate the result of the operation.
7. Output the result based on the user's choice. Include SIX decimal places for addition, subtraction, and multiplication and ZERO decimal places for division.

Hint: As before, for division, use operand_one as the dividend and operand_two as the divisor.

Lab I/O Format

The same I/O Format on Part A is required on Part B. Please see the Lab I/O formatting specifications in Part A if you need a refresher.

Example Execution #1

Welcome to our Enhanced Calculator!
Input the first operand.
FIRST> 3.14
Input the second operand.
SECOND> 2.72

Choose one of the following operations:
  1 - addition
  2 - subtraction
  3 - multiplication
  4 - division
OPERATION> 2

The result of the subtraction is: 0.420000
OUTPUT 0.420000
Thank you for using our calculator.

Example Execution #2

Welcome to our Enhanced Calculator!
Input the first operand.
FIRST> 12
Input the second operand.
SECOND> 7

Choose one of the following operations:
  1 - addition
  2 - subtraction
  3 - multiplication
  4 - division
OPERATION> 4

The result of the division is: 1 (quotient) and 5 (remainder)
OUTPUT 1
OUTPUT 5
Thank you for using our calculator.

Gradescope Submission Nuances

Part B will ONLY be submitted to Gradescope (you will NOT demo this lab in class).
When you submit your Python file to Gradescope, multiple different test cases are run on your code. Passing all of the tests results in a 100% on the autograded portion of the lab.

You are allowed to submit to Gradescope four times (or less) for this lab. The maximum grade of your submissions will be your grade for the lab. Note: If your code doesn’t work (e.g., a syntax error exists, or an error is thrown in execution), then you will received an AUTOMATIC ZERO. You should test your code before submitting to ensure it executes correctly.

Comments

All Python files should include a header with your name, section, assignment info, references (i.e., who did you collaborate with on this assignment?; what resource did you use?), and approximate time taken to do the assignment. . Be sure to cite any allowed external references used to complete the assignment. Any code without this header will lose 1 point. Here's an example:
        #   Tracy Camp
        #   ​CSCI 102 – Section G
        #   Week 3 - Lab B - Enhanced Calcuator
        #   References: Instructor Dylan to get started
        #   Time: 25 minutes

Submit Solutions

Follow these steps to submit your files to Gradescope.

1. In Gradescope, go to Assignments > Week3A and upload Week3A-twitter.py.
2. In Gradescope, go to Assignments > Week3B and upload Week3B-enhanced_calculator.py.

To receive credit, your code must execute in Python 3, and you must submit a single file for each portion of the assignment (your Python code file). In addition, your code must follow the Lab I/O Format.

Whenever you submit something to Gradescope, we strongly recommend you always double check what you submitted actually got submitted correctly (e.g., did the file upload correctly? did you submit the correct file? etc.) If your submission is incorrect, it's on you.

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