Rust 编程视频教程对应讲解内容-方法
视频地址
头条地址:https://www.ixigua.com/i676544267458235648...
B站地址:https://www.bilibili.com/video/av78062009?...
网易云课堂地址:https://study.163.com/course/introduction....
讲解内容
1、rust中的方法类似于c++中类的成员函数。
2、方法例子
#[derive(Debug)]
struct Dog {
name: String,
weight: f32,
height: f32,
}
impl Dog { //下面为实现方法
fn get_name(&self) -> &str{
&(self.name[..])
}
fn get_weight(&self) -> f32 {
self.weight
}
fn get_height(&self) -> f32 {
self.height
}
}
fn main() {
let dog = Dog{name: String::from("jack"), weight:20.5, height: 60.0};
println!("name = {}", dog.get_name().to_string());
println!("weight = {}", dog.get_weight());
println!("height = {}", dog.get_height());
println!("Hello, world!");
}
3、可以有多个impl块
上面的代码
impl Dog { //下面为实现方法
fn get_name(&self) -> &str{
&(self.name[..])
}
fn get_weight(&self) -> f32 {
self.weight
}
fn get_height(&self) -> f32 {
self.height
}
}
还可以写为多个impl块,如下:
impl Dog { //下面为实现方法
fn get_name(&self) -> &str{
&(self.name[..])
}
}
impl Dog { //下面为实现方法
fn get_weight(&self) -> f32 {
self.weight
}
}
impl Dog { //下面为实现方法
fn get_height(&self) -> f32 {
self.height
}
}
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