catalog.ion

struct Product {
    unit_price: int;
    quantity: int;
}

fn line_total(product: Product) -> int {
    return product.unit_price * product.quantity;
}

pub fn catalog_line_count() -> int {
    return 3;
}

pub fn catalog_grand_total() -> int {
    let row0: Product = Product { unit_price: 1200, quantity: 2 };
    let row1: Product = Product { unit_price: 350, quantity: 5 };
    let row2: Product = Product { unit_price: 99, quantity: 10 };
    let total0: int = line_total(row0);
    let total1: int = line_total(row1);
    let total2: int = line_total(row2);
    return total0 + total1 + total2;
}

pub fn catalog_units_in_stock() -> int {
    let quantities: [int; 3] = [2, 5, 10];
    let mut units: int = 0;
    for qty in quantities {
        units = units + qty;
    }
    return units;
}