#![allow(dead_code)]
pub struct User {
name: String,
age: u32,
height: f32,
visit_count: usize,
last_blood_pressure: Option<(u32, u32)>,
}
pub struct Measurements {
height: f32,
blood_pressure: (u32, u32),
}
pub struct HealthReport<'a> {
patient_name: &'a str,
visit_count: u32,
height_change: f32,
blood_pressure_change: Option<(i32, i32)>,
}
impl User {
pub fn new(name: String, age: u32, height: f32) -> Self {
Self { name, age, height, visit_count: 0, last_blood_pressure: None }
}
pub fn visit_doctor(&mut self, measurements: Measurements) -> HealthReport {
self.visit_count += 1;
let bp = measurements.blood_pressure;
let report = HealthReport {
patient_name: &self.name,
visit_count: self.visit_count as u32,
height_change: measurements.height - self.height,
blood_pressure_change: match self.last_blood_pressure {
Some(lbp) => {
Some((bp.0 as i32 - lbp.0 as i32, bp.1 as i32 - lbp.1 as i32))
}
None => None,
},
};
self.height = measurements.height;
self.last_blood_pressure = Some(bp);
report
}
}
fn main() {
let bob = User::new(String::from("Bob"), 32, 155.2);
println!("저는 {}이고, 나이는 {}세입니다.", bob.name, bob.age);
}
#[test]
fn test_visit() {
let mut bob = User::new(String::from("Bob"), 32, 155.2);
assert_eq!(bob.visit_count, 0);
let report =
bob.visit_doctor(Measurements { height: 156.1, blood_pressure: (120, 80) });
assert_eq!(report.patient_name, "Bob");
assert_eq!(report.visit_count, 1);
assert_eq!(report.blood_pressure_change, None);
let report =
bob.visit_doctor(Measurements { height: 156.1, blood_pressure: (115, 76) });
assert_eq!(report.visit_count, 2);
assert_eq!(report.blood_pressure_change, Some((-5, -4)));
}