rust 结构体

在impl块定义的函数被称为方法,之外则是自由函数

impl People{
    fn new(name: &'static str,age: i32) -> Self{
        return People{name:name,age:age};
    }

    fn set_name(&mut self,name:&'static str){
        self.name = name;
    }

    fn set_age(&mut self,age:i32){
        self.age = age;
    }
}

fn main() {
    let p = People::new("sz",3);
    println!("name:{},age:{}",p.name,p.age);

    let mut p2 = People{name:"ls",age:4};
    println!("name:{},age:{}",p2.name,p2.age);

    p2.set_name("ww");
    p2.set_age(5);
    println!("name:{},age:{}",p2.name,p2.age);
}

name:sz,age:3
name:ls,age:4
name:ww,age:5

设置Copy按位复制

#[derive(Debug,Copy,Clone)]
struct AA{
    a:i32,
    b:u32,
}

fn testCopy(){
    let a = AA{a:1,b:2};
    let b = a;
    println!("{:?}",b);
}