编辑代码

fn main() {
    let mut user1 = User {
        name: String::from("张三"),
        active: true,
        sex: 1,
    };

    user1.sex = 0;
    println!("{:#?}", user1);
}

#[derive(Debug)]
struct User {
    name: String,
    sex: i8,
    active: bool,
}