rust学习

Posted 2022-05-29 shaohef

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match if  

 1 #![allow(unused)]
 2 fn write_bar(size: u64)
 3     match size
 4         o if o < 100 => println!(":? less than 100", o),
 5         o if o < 200 && o > 100  => println!(":? between 100-200", o),
 6         _ => println!(":? bigger than 200", size),
 7     
 8 
 9 fn main() 
10     write_bar(10);
11     write_bar(150);
12     write_bar(250);
13 

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 println!(":#?", 1)

 1 #[derive(Debug)]
 2 struct Teacher<‘a> 
 3     name: &‘a str,
 4     age1: u8
 5 
 6 
 7 #[derive(Debug)]
 8 struct Person<‘a> 
 9     name: &‘a str,
10     age: u8
11 
12 
13 fn main() 
14     let name = "Peter";
15     let mut age = 27;
16     let peter = Person  name, age ;
17     
18     age = 22;
19     let lilei = Teacher name:"Lilei", age1:age;
20     // 美化打印
21     println!(":#?", lilei);
22     println!(":#?", peter);
23 

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