hello_world.rs

use std::io;
use rand::Rng;

// A simple struct to represent a person
struct Person {
    name: String,
    age: u32,
}

impl Person {
    fn new(name: String, age: u32) -> Person {
        Person { name, age }
    }

    fn greet(&self) {
        println!("Hello, my name is {} and I am {} years old!", self.name, self.age);
    }
}

// Function to generate a random number and return it with a message
fn generate_lucky_number() -> u32 {
    let lucky_number = rand::thread_rng().gen_range(1..=100);
    println!("Your lucky number for today is: {}", lucky_number);
    lucky_number
}

fn main() {
    println!("Welcome to the enhanced Rust program!");
    
    // Get user input
    println!("Please enter your name:");
    let mut input = String::new();
    io::stdin()
        .read_line(&mut input)
        .expect("Failed to read line");
    let name = input.trim().to_string();
    
    // Create a new Person instance
    let person = Person::new(name, 25);
    person.greet();
    
    // Generate and use lucky number
    let lucky_num = generate_lucky_number();
    if lucky_num > 50 {
        println!("That's a high number - you're having a lucky day!");
    } else {
        println!("That's a lower number - but don't worry, luck is what you make of it!");
    }
    
    // Demonstrate vector operations
    let mut numbers = vec![1, 2, 3, 4, 5];
    numbers.push(6);
    let sum: i32 = numbers.iter().sum();
    println!("The sum of numbers 1 through 6 is: {}", sum);
    
    println!("Thank you for running this program!");
}