stivenson

struct Man {
	name: &'static str,
	cellphone: i64,
	is_alive: bool,
}

trait Person {
	fn new(name: &'static str, cellphone: &i64) -> Self;
	fn name(&self) -> &'static str;
	fn is_alive(&self) -> &bool;

stivenson

// other Code ...

trait Travel {
	fn new(destination: &'static str) -> Self;
	fn go(&self) -> &'static str;
}

impl Travel for Man {
	fn new(destination: &'static str) -> Man {
		// logic ...

stivenson

const VALUES_COP: &'static [i32;4] = &[50000, 20000, 10000, 2000];

// macro called cashier
macro_rules! cashier {
    () => { // without arguments
        println!("Now is necessary that you enter a quantity.");
    };
    ($($x: expr),+) => { // 1 to n arguments
        {
            let mut total: u64 = 0;

stivenson

 let result = |word| {
        
        // Heavy logic //
        let fname = "text_to_find.txt";
        // Contents of file
        let contents = fs::read_to_string(fname).expect("Something went wrong reading the file");
        // Search a word into file's content
        match contents.find(word) {
            Some(v) => v as u64, 
            None => 0