Rustの構造体
struct User {
username: String,
email: String,
sign_in_count: u64,
active: bool,
}
fn main() {
let user1 = User {
email: String::from("someone@example.com"),
username: String::from("someusername123"),
active: true,
sign_in_count: 1,
};
println!("{}", user1.email); //someone@example.com
}
struct Body {
weight: f64,
height: f64,
}
impl Body {
fn bmi_calc(&self) -> f64 {
self.weight/(self.height*self.height)
}
}
fn main() {
let body = Body{weight: 60., height: 1.7};
let bmi = body.bmi_calc();
println!("bmi: {}", bmi); //20.761245674740486
}
struct User {
username: String,
email: String,
sign_in_count: u64,
active: bool,
}
fn main() {
let mut user1 = User {
username: String::from("username1"),
email: String::from("[email protected]"),
active: true,
sign_in_count: 1,
};
user1.username = String::from("username2");
println!("{}", user1.username); //username2
}