exercism/zig/eliuds-eggs/README.md

71 lines
No EOL
1.5 KiB
Markdown

# Eliuds Eggs
Welcome to Eliuds Eggs on Exercism's Zig Track.
If you need help running the tests or submitting your code, check out `HELP.md`.
## Introduction
Your friend Eliud inherited a farm from her grandma Tigist.
Her granny was an inventor and had a tendency to build things in an overly complicated manner.
The chicken coop has a digital display showing an encoded number representing the positions of all eggs that could be picked up.
Eliud is asking you to write a program that shows the actual number of eggs in the coop.
The position information encoding is calculated as follows:
1. Scan the potential egg-laying spots and mark down a `1` for an existing egg or a `0` for an empty spot.
2. Convert the number from binary to decimal.
3. Show the result on the display.
Example 1:
```text
Chicken Coop:
_ _ _ _ _ _ _
|E| |E|E| | |E|
Resulting Binary:
1 0 1 1 0 0 1
Decimal number on the display:
89
Actual eggs in the coop:
4
```
Example 2:
```text
Chicken Coop:
_ _ _ _ _ _ _ _
| | | |E| | | | |
Resulting Binary:
0 0 0 1 0 0 0 0
Decimal number on the display:
16
Actual eggs in the coop:
1
```
## Instructions
Your task is to count the number of 1 bits in the binary representation of a number.
## Restrictions
Keep your hands off that bit-count functionality provided by your standard library!
Solve this one yourself using other basic tools instead.
## Source
### Created by
- @keiravillekode
### Based on
Christian Willner, Eric Willigers - https://forum.exercism.org/t/new-exercise-suggestion-pop-count/7632/5