rust学习六、简单的struct结构 - ToB企服应用市场:ToB评测及商务社交产业平台

struct Point{x:f64,y:f64}
struct Triangle(Point,Point,Point);
/**
* 家庭结构体s
*/
struct Family {
name: String,
father: String,
mather: String,
children: Vec<String>,
}
/**
* 这都什么狗屎语法。
*/
struct Book<'a> {
name: &'a str,
author: &'a str,
price: f64,
pubyear: i32,
}
fn main() {
let mut family = Family {
name: String::from("家"),
father: String::from("爸爸"),
mather: String::from("妈妈"),
children: vec![],
};
family.children.push(String::from("老大-独龙"));
family.children.push(String::from("老二-独眼"));
family.children.push(String::from("老三-独秀"));
family.children.push(String::from("老四-嘟嘟"));
family.children.push(String::from("老五-杜牧"));
//打印家庭结构体
println!(
"家庭:{},父亲:{},母亲:{}",
family.name, family.father, family.mather
);
for child in &family.children {
println!("孩子:{}", child);
}
let mut 三国演义 = Book {
name: "三国演义",
author: "罗贯中",
price: 29.8,
pubyear: 1300,
};
//各种创建结构实例的方式
// 方式一：双点号复制
let mut 红楼梦=Book{
name:"红楼梦",
author:"曹雪芹",
..三国演义
};
//方式二: 略属性名
let 西游记=write_book("西游记","吴承恩",24.0,1525);
//方式三:使用基于元组定义的。比java的record还简单
let books=[三国演义,红楼梦,西游记];
for i in 0..books.len() {
print_book(&books[i]);
}
let p1=Point{x:10.0,y:20.0};
let p2=Point{x:20.0,y:20.0};
let p3=Point{x:20.0,y:10.0};
let t=Triangle(p1,p2,p3);
print_triangle(&t);
}
fn print_book(book:&Book){
println!(
"书名:{},作者:{},价格:{},出版年:{}",
book.name, book.author, book.price, book.pubyear
);
}
fn print_triangle(t:&Triangle){
println!("三点坐标:");
println!("{},{}",t.0.x,t.0.y);
println!("{},{}",t.1.x,t.1.y);
println!("{},{}",t.2.x,t.2.y);
}
fn write_book<'a>(name:&'a str,author:&'a str,price:f64,pubyear:i32)->Book<'a>{
Book{
name,
author,
price,
pubyear
}
}

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let mut 红楼梦=Book{
name:"红楼梦",
author:"曹雪芹",
..三国演义
};

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#[derive(Debug)]
struct Family{
father:String,
mather:String,
address:String
}
fn main(){
let mut mf=Family{
father:String::from("lu"),
mather:String::from("hu"),
address:String::from("中国")
};
println!("我家-{},{},{}",mf.father,mf.mather,mf.address);
print_family(&mf);
print_family_use_dbg(&mf);
}
fn print_family(f:&Family){
//你不能直接打印，否则会有奇奇怪怪的错误提示
//println!("{}",f); // 这个会提示错误，所以注释掉了
//使用奇怪符号 :?打印结构体
println!("我家:?-{:?}",f);
//使用奇怪的符号，可以打印结构体 :#?
println!("我家:#?-{:#?}",f);
}
fn print_family_use_dbg(f:&Family){
dbg!(f);
}

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