61 lines
3.6 KiB
Markdown
61 lines
3.6 KiB
Markdown
# Homework 0 - Software Prototyping ID311
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- Use this homework to test yourself before taking the course.
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- _[Live demo](http://hwdemo.prototyping.id/hw0)_
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## General Description
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<p align="center">
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<img src="assets/main.png" width="600" />
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</p>
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In this assignment, you need to implement a function that computes the time difference between two integer numbers input by the user, representing time expressed in the military format HHMMSS. `HH` stands for hours (00 to 23), `MM` for minutes (00-59), and `SS` for seconds (00-59). The function validates the input (i.e., it checks whether hours, minutes, and seconds are correct), computes the difference between the two numbers, and returns a string formatted as "HH:MM:SS" with the resulting time difference to be displayed in the graphical interface.
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Here is the function signature that you have to complete:
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```js
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function computeDifference(start, end) {
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// TODO: fill up the content on this function
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return 'HH:MM:SS'; // PLACEHOLDER
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}
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```
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- The function parameters `start` and `end` are the two input times. So, for example, `123456` would mean hours are 12, minutes are 34, and seconds are 56.
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- The maximum difference between the two times is `23:59:59`.
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- `end` can be smaller than `start`: in such case, it means that you need to compute the time difference from the previous day at the time `start` to the next day at the time `end`.
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- If the user input is invalid (for example, minutes greater than 59), you should return `undefined`.
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- The time difference to return as a string should be formatted with the `:` between hours and minutes and minutes and seconds. For example, `10:01:20` means that there is a difference of 10 hours, 1 minute, and 20 seconds.
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- Feel free to modify the code as you please (e.g., creating new functions, global variables, or anything you want to).
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## How to get started
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- Clone or download this repository on your computer.
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- Open the repository folder with VSCode
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- Start coding in `main.js`, which is the only file you need to modify
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- To see the result, use the `LiveServer` extension
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## About grading
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The maximum score for this assignment is 100 points. If the program does not compile (e.g., not a valid javascript file), the score is 0. If it runs, the score is inversely proportional to the number of errors. If the code has runtime errors, there is a 20 points penalty, plus a penalty for any additional part that cannot be checked.
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You will receive a score for this assignment, **however** this **DOES NOT COUNT** toward your final score. It is a score only for yourself to help you decide whether to take this class or not.
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## How to submit
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<p align="center">
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<img src="assets/submission.png" width="600" />
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</p>
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1. After completing your code, make sure to fill up the [SubmissionNotes](SubmissionNotes.md) with your basic info and indicate whether you received any help. Feel free to add any relevant information.
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2. Zip the folder of this repository containing your solution.
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3. Submit the homework using the class [submission system](https://homework.prototyping.id).
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4. For any problem, feel free to contact the professor or TA via Discord. No emails, please.
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**NOTES**
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- Only submissions made with the system will be considered (e.g., no direct emails to TA or Prof).
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- You can re-submit as many times as you want: the last submission only will be considered.
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- Submissions after the deadline (even a few minutes) will receive a penalty of 10%. After 24 hours from the deadline, you will receive 0 points.
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- Keep a screenshot that proves your completed submission.
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- Coding style might be considered in grading.
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