Esercizio espressioni C++ Bribro N2

#include <iostream>

int main() {
    using namespace std;

    double milk_price,
        pasta_price,
        meat_price,
        threshold;

    unsigned short milk_amount,
        pasta_amount,
        meat_amount,
        min_discount_percentage,
        max_discount_percentage;

    cout << "Insert milk_price, pasta_price, meat_price, threshold: ";

    cin >>
        milk_price >>
        pasta_price >>
        meat_price >>
        threshold;

    cout << "milk_amount, pasta_amount, meat_amount, min_discount_percentage, max_discount_percentace: ";

    cin >>
        milk_amount >>
        pasta_amount >>
        meat_amount >>
        min_discount_percentage >>
        max_discount_percentage;

    double
        milk_expence = (double)milk_amount * milk_price,
        pasta_expence = (double)pasta_amount * pasta_price,
        meat_expence = (double)meat_amount * meat_price;

    double total_expence =
        milk_expence + pasta_expence + meat_expence;

    double discounted;
    if ( total_expence > threshold )
        discounted = total_expence - ( ( max_discount_percentage / (double)100 ) * total_expence );
    else
        discounted = total_expence - ( ( min_discount_percentage / (double)100 ) * total_expence );

    cout << "Milk: " << milk_expence << endl
        << "Pasta: " << pasta_expence << endl
        << "Meat: " << meat_expence << endl
        << "Total: " << total_expence << endl
        << "Discounted: " << discounted << endl;

    return 0;
}