Function eop

pub fn eop()

面向表达式 (Expression-Oriented programming)

use std::collections::HashMap;

fn add_one(i: &mut u32) {
    *i += 1;
}

fn plus_one(i: &u32) -> u32 {
    let i = i + 1;
    i
}

fn main() {
    let mut a = 41 ;
    add_one(&mut a) ;
    println!("{:?}", a) ;

    let a = 41;
    let b = plus_one(&a);
    println!("{:?}", b) ;

    let mut h = HashMap::new();
    h.insert("anwser", 42);
    println!("anwser is {:?}", h["anwser"]);
}