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xpetit
32eddefd09
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4 years ago | |
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README.md | 4 years ago |
README.md
changes
Instructions
Imagine you are working on a software to control smart lights in a house. You have access to an array of all the lights in a house.
Define the associated function new
to the data structure Light
which creates a new light with the alias passed in the arguments and a brightness of 0.
Define the function change_brightness
that receives a Vec
of lights, an alias
and a u8
value. The function then sets the u8
value as the new brightness of the light identified by the alias in the Vec of lights.
Notions
Example of Structs Keyword Self
Expected Functions and Structure
#[derive(Debug, Eq, PartialEq, Clone)]
pub struct Light {
pub alias: String,
pub brightness: u8,
}
impl Light {
pub fn new(alias: &str) -> Self {
}
}
pub fn change_brightness(lights: &mut Vec<Light>, alias: &str, value: u8) {
}
Usage
Here is an incomplete program to test your function
use changes::*;
fn main() {
// bedroom
let mut lights = vec![
Light::new("living_room"),
Light::new("bedroom"),
Light::new("rest_room"),
];
println!("brightness = {}", lights[0].brightness);
change_brightness(&mut lights, "living_room", 200);
println!("new brightness = {}", lights[0].brightness);
}
And its expected output
student@ubuntu:~/changes/test$ cargo run
brightness = 0
new brightness = 200
student@ubuntu:~/changes/test$