mirror of
https://github.com/mfocko/blog.git
synced 2024-11-25 06:11:55 +01:00
182 lines
5.2 KiB
Markdown
182 lines
5.2 KiB
Markdown
---
|
|
id: seminar-04
|
|
title: 4th seminar
|
|
description: |
|
|
Robot in a maze.
|
|
last_update:
|
|
date: 2023-03-13
|
|
---
|
|
|
|
:::caution
|
|
|
|
Deadline for the submission of the bonus is **March 23th 24:00**.
|
|
|
|
:::
|
|
|
|
:::tip
|
|
|
|
In case you have any questions, feel free to reach out either by email, Discord
|
|
or just by submitting an issue [here](https://gitlab.fi.muni.cz/xfocko/kb/-/issues/new).
|
|
|
|
:::
|
|
|
|
For this bonus you can get 3 K₡ and another 0.5 K₡ for the bonus part of it.
|
|
|
|
[Source](pathname:///files/c/bonuses/04.tar.gz)
|
|
|
|
## Introduction
|
|
|
|
In this task you are given a 2D map for a robot. The map contains multiple markers:
|
|
|
|
- `^v<>` - which denote the directions the robot will be facing when he steps into
|
|
the cell or starts on it.
|
|
- `K` - denotes the key.
|
|
- `T` - denotes the treasure.
|
|
|
|
In case robot lands at the beginning on unknown field, e.g. `.` in the tests, he
|
|
faces the direction that is given through the parameter.
|
|
|
|
Your task is to write the `walk` function that returns end result of the walk.
|
|
Walk can end in multiple ways:
|
|
|
|
- `FOUND_TREASURE` - when you find the treasure
|
|
- `FOUND_KEY` - when you find the key
|
|
- `OUT_OF_BOUNDS` - when the robot falls off the map
|
|
- `INFINITE_LOOP` - in case you will implement the bonus
|
|
- `NONE` - which is used right now as a default return in the skeleton, has no meaning
|
|
later on
|
|
|
|
## Hard requirement
|
|
|
|
There is only one hard requirement that tests cannot check.
|
|
|
|
**You are not allowed to use any indexing related to map or your current position**
|
|
**in your implementation.**
|
|
|
|
Reason for this requirement is for you to get used to working with pointers. And
|
|
for the implementation of this task it is much easier to use just the pointers.
|
|
|
|
## Example of run
|
|
|
|
For a better understanding of your task, I will describe a simple walk with corresponding
|
|
function call.
|
|
|
|
```c
|
|
const char *map = (
|
|
">.v"
|
|
".K<"
|
|
"..."
|
|
);
|
|
|
|
walk(map, &map[6], '^', 3, 3);
|
|
```
|
|
|
|
For this call, you should return `FOUND_KEY`. Let us walk through the walk ;)
|
|
|
|
1. Robot is placed at the bottom left corner, there is no direction specified, so
|
|
he follows the direction given by parameter (upwards, denoted as `N`(orth),
|
|
so that we can differentiate markers on the map with the robot when using printing
|
|
function).
|
|
|
|
```
|
|
>.v
|
|
.K<
|
|
N..
|
|
```
|
|
|
|
2. Moves up:
|
|
|
|
```
|
|
>.v
|
|
NK<
|
|
...
|
|
```
|
|
|
|
3. Moves up (now covers `>`), changes direction to right:
|
|
|
|
```
|
|
E.v
|
|
.K<
|
|
...
|
|
```
|
|
|
|
4. Moves to right:
|
|
|
|
```
|
|
>Ev
|
|
.K<
|
|
...
|
|
```
|
|
|
|
5. Moves to right, faces south:
|
|
|
|
```
|
|
>.S
|
|
.K<
|
|
...
|
|
```
|
|
|
|
6. Moves down, faces west:
|
|
|
|
```
|
|
>.v
|
|
.KW
|
|
...
|
|
```
|
|
|
|
7. Moves left, founds key, returns `FOUND_KEY`:
|
|
|
|
```
|
|
>.v
|
|
.W<
|
|
...
|
|
```
|
|
|
|
## Bonus part
|
|
|
|
For the bonus part you are supposed to return `INFINITE_LOOP` in case the robot
|
|
is stuck in the infinite loop. There are three tests for it. If you pass only the
|
|
easy and medium one, you can get 0.25 K₡ for doing your best and trying it out. :)
|
|
|
|
## Easter eggs
|
|
|
|
- Statistics
|
|
|
|
| Language | Files | Lines | Blanks | Comments | Code | Complexity |
|
|
| ---------------- | ----: | ----: | -----: | -------: | ---: | ---------: |
|
|
| _C_ | 4 | 458 | 34 | 58 | 366 | 33 |
|
|
| `test_maze.c` | | 225 | 9 | 0 | 216 | 4 |
|
|
| `sol.maze.c` | | 141 | 15 | 28 | 98 | 24 |
|
|
| `maze.c` | | 84 | 8 | 30 | 46 | 5 |
|
|
| `main.c` | | 8 | 2 | 0 | 6 | 0 |
|
|
| _C Header_ | 1 | 33 | 3 | 19 | 11 | 0 |
|
|
| `maze.h` | | 33 | 3 | 19 | 11 | 0 |
|
|
| _CMake_ | 1 | 25 | 4 | 6 | 15 | 2 |
|
|
| `CMakeLists.txt` | | 25 | 4 | 6 | 15 | 2 |
|
|
| **Total** | 6 | 516 | 41 | 83 | 392 | 35 |
|
|
|
|
- Majority of the line count in solution is caused by the formatting :)
|
|
- Included headers can be interpreted as hints, same goes for the unimplemented
|
|
`static` functions which you can use, but **are not required**.
|
|
- Given `CMakeLists.txt` will generate 2 binaries, `test_maze` and `maze`.
|
|
- `test_maze` runs the tests you are given.
|
|
- `maze` runs the `main.c`, where you can debug, print mazes and whatever else
|
|
you want.
|
|
- I keep only one copy of `cut.h` in my repository, so you need to download it from
|
|
[here](https://gitlab.fi.muni.cz/pb071/cut/-/jobs/159010/artifacts/file/1header/cut.h) and place it into the directory where you have your source code.
|
|
- Or you can use the one you have from the latest homework, git will keep it
|
|
only once, so it doesn't take up more space.
|
|
- I would recommend cloning this repository and copying the `maze` directory to
|
|
your own repository, since there are multiple files and it may be easier for you.
|
|
|
|
In case you have any questions, feel free to reach out to me.
|
|
|
|
## Submitting
|
|
|
|
For submitting the bonus assignment you can follow the same procedure as for
|
|
submitting the homeworks, that is:
|
|
|
|
1. On branch `main` add the provided skeleton.
|
|
2. Checkout new branch `seminar-bonus-04`.
|
|
3. Add your solution to the newly created branch.
|
|
4. Create a MR to the `main` branch with me (`@xfocko`) as the reviewer.
|