mirror of
https://codeberg.org/andyscott/exercism.git
synced 2024-12-22 14:43:10 -05:00
54 lines
1.6 KiB
Markdown
54 lines
1.6 KiB
Markdown
|
# Resistor Color
|
||
|
|
|
||
|
|
Welcome to Resistor Color on Exercism's Zig Track.
|
||
|
|
If you need help running the tests or submitting your code, check out `HELP.md`.
|
||
|
|
|
||
|
|
## Instructions
|
||
|
|
|
||
|
|
If you want to build something using a Raspberry Pi, you'll probably use _resistors_.
|
||
|
|
For this exercise, you need to know two things about them:
|
||
|
|
|
||
|
|
- Each resistor has a resistance value.
|
||
|
|
- Resistors are small - so small in fact that if you printed the resistance value on them, it would be hard to read.
|
||
|
|
|
||
|
|
To get around this problem, manufacturers print color-coded bands onto the resistors to denote their resistance values.
|
||
|
|
Each band has a position and a numeric value.
|
||
|
|
|
||
|
|
The first 2 bands of a resistor have a simple encoding scheme: each color maps to a single number.
|
||
|
|
|
||
|
|
In this exercise you are going to create a helpful program so that you don't have to remember the values of the bands.
|
||
|
|
|
||
|
|
These colors are encoded as follows:
|
||
|
|
|
||
|
|
- black: 0
|
||
|
|
- brown: 1
|
||
|
|
- red: 2
|
||
|
|
- orange: 3
|
||
|
|
- yellow: 4
|
||
|
|
- green: 5
|
||
|
|
- blue: 6
|
||
|
|
- violet: 7
|
||
|
|
- grey: 8
|
||
|
|
- white: 9
|
||
|
|
|
||
|
|
The goal of this exercise is to create a way:
|
||
|
|
|
||
|
|
- to look up the numerical value associated with a particular color band
|
||
|
|
- to list the different band colors
|
||
|
|
|
||
|
|
Mnemonics map the colors to the numbers, that, when stored as an array, happen to map to their index in the array:
|
||
|
|
Better Be Right Or Your Great Big Values Go Wrong.
|
||
|
|
|
||
|
|
More information on the color encoding of resistors can be found in the [Electronic color code Wikipedia article][e-color-code].
|
||
|
|
|
||
|
|
[e-color-code]: https://en.wikipedia.org/wiki/Electronic_color_code
|
||
|
|
|
||
|
|
## Source
|
||
|
|
|
||
|
|
### Created by
|
||
|
|
|
||
|
|
- @massivelivefun
|
||
|
|
|
||
|
|
### Based on
|
||
|
|
|
||
|
|
Maud de Vries, Erik Schierboom - https://github.com/exercism/problem-specifications/issues/1458
|