Rust

12.5    Solutions

This section provides the code solutions for the practice exercises in Section 12.4. The code is largely self-explanatory; however, we have included comments and additional explanations wherever necessary to enhance understanding.

1. Initialize a struct with public and private fields

   #[derive(Debug)]struct Employee {    employee_id: u32,    pub age: u8,    pub name: String,}impl Employee {    pub fn new(emp_name: String) -> Self {        Self {            employee_id: 0,            age: 30,            name: emp_name,        }    }}fn main() {    let emp_1 = Employee::new("Alice".to_string());}  

2. Validate struct fields using custom validation logic

   #[derive(Default)]struct Car {    car_id: u32,    model_name: String,    year: u16,}impl Car {    pub fn new(car_model_name: String, car_year: u16) -> Result ...