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README.md | 2 years ago |
README.md
box_recursion
Instructions
Using the given code, create the following associated functions:
new
: which will initialize theWorkEnvironment
withgrade
set toNone
.add_worker
: which receives two strings, one being the type of worker and the other the name of the worker.remove_worker
: which removes the last worker that was placed in theWorkEnvironment
, this function returns anOption
with the name of the worker.search_worker
: which returns a tuple with the name and type of worker.
You must also create a type named Link
. This will be the connection between the WorkEnvironment
and Worker
structures. This will be a recursion type, and it must point to None
if there is no Worker
to point to.
Expected Functions and structures
pub struct WorkEnvironment {
pub grade: Link,
}
pub type Link =
pub struct Worker {
pub worker_type: String,
pub worker_name: String,
pub next_worker: Link,
}
impl WorkEnvironment {
pub fn new() -> WorkEnvironment {}
pub fn add_worker(&mut self, t: String, name: String) {}
pub fn remove_worker(&mut self) -> Option<String> {}
pub fn search_worker(&self) -> Option<(String, String)> {}
}
Usage
Here is a program to test your function,
use box_recursion::*;
fn main() {
let mut list = WorkEnvironment::new();
list.add_worker(String::from("CEO"), String::from("Marie"));
list.add_worker(String::from("Manager"), String::from("Monica"));
list.add_worker(String::from("Normal Worker"), String::from("Ana"));
list.add_worker(String::from("Normal Worker"), String::from("Alice"));
println!("{:?}", list);
println!("{:?}", list.search_worker());
list.remove_worker();
list.remove_worker();
list.remove_worker();
list.remove_worker();
println!("{:?}", list);
}
And its output:
$ cargo run
WorkEnvironment { grade: Some(Worker { worker_type: "Normal Worker", worker_name: "Alice", next_worker: Some(Worker { worker_type: "Normal Worker", worker_name: "Ana", next_worker: Some(Worker { worker_type: "Manager", worker_name: "Monica", next_worker: Some(Worker { worker_type: "CEO", worker_name: "Marie", next_worker: None }) }) }) }) }
Some(("Alice", "Normal Worker"))
WorkEnvironment { grade: None }
$