Rust

5.8    Solutions

This section provides the code solutions for the practice exercises in Section 5.7. The code is largely self-explanatory; however, we have included comments and additional explanations wherever necessary to enhance understanding.

1. Storing different types in a vector

   #[derive(Debug)]enum Value {    Integer(i32),    Float(f32),}fn main() {    let some_val = vec![Value::Integer(12), Value::Float(15.5)];    for i in some_val {        match i {            Value::Integer(num) => println!("Integer: {} ", num),            Value::Float(num) => println!("Float: {}", num),        }    }}  

2. Implementing a library management system

   #[derive(Debug)]struct Item {    id: i32,    title: String,    year: i32,    type_: ItemType,}#[derive(Debug)]enum ItemType {    Book,    Magazine,}fn display_item_info(item: ...