编辑代码

use std::collections::BTreeMap;
use std::collections::HashMap;
struct Point {
    x: f64,
    y: f64,
}


fn main() {
    println!("Hello world!     -  rust.jsrun.net");
    for _ in 0..10 { println!("Hello"); }
    print!("{}", "Hello\n".repeat(10));

    finish("yezi");

    finish("yezi2");

    print!("{}", square(10));

    let p = Point { x: 1.122, y: 7.45 };
    println!("{}, {}", p.x, p.y);


}

fn finish(name: &str) {
    println!("My job here is done. Goodbye {}", name);
}

fn square(x : u32) -> u32 { x * x }