RustEn8Etapes/etape7/ex7_7.rs

/* Copyright (C) 2011-2023  Patrick H. E. Foubet - E2L Ivry
Ecole du Logiciel Libre : https://e2li.org/

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or any
later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>
*******************************************************************/

fn main(){
  let x : Option<bool> = Some(true) ; // paramètres génériques
  let y : Option<i32> = Some(10) ;
  let z : Option<f64> = Some(20.88) ;
  let n : Option<i32> = None ;
  match x {
    Some(x) => { println ! ("x = {}", x) },
    None => { println ! ("x = Vide") },
  }
  match y {
    Some(y) => { println ! ("y = {}", y) },
    None => { println ! ("y = Vide") },
  }
  match z {
    Some(z) => { println ! ("z = {}", z) },
    None => { println ! ("z = Vide") },
  }
  match n {
    Some(n) => { println ! ("n = {}", n) },
    None => { println ! ("n = Vide") },
  }
}