rustlings/exercises/quiz1.rs

// quiz1.rs
// This is a quiz for the following sections:
// - Variables
// - Functions
// - If

// Mary is buying apples. One apple usually costs 2 Rustbucks, but if you buy
// 40 or more at once, each apple only costs 1! Write a function that calculates
// the price of an order of apples given the quantity bought. No hints this time!

// Put your function here!
fn calculate_price_of_apples(qty:i32) -> i32 {
    qty + if qty <= 40 {qty} else {0}
}

// Don't modify this function!
#[test]
fn verify_test() {
    let price1 = calculate_price_of_apples(35);
    let price2 = calculate_price_of_apples(40);
    let price3 = calculate_price_of_apples(65);

    assert_eq!(70, price1);
    assert_eq!(80, price2);
    assert_eq!(65, price3);
}