11. Fruit Shop

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    string product, day;
     double quantity;
        cin >> product >> day;
        cin >> quantity;

        double price = 0.0;


    if (day == "Monday" || day == "Tuesday" || day == "Wednesday" || day == "Thursday" || day == "Friday")
    {
        if (product == "banana")
        {
            price = quantity * 2.50;
        }
        else if (product == "apple")
        {
            price = quantity * 1.20;
        }
        else if (product == "orange")
        {
            price = quantity * 0.85;
        }
        else if (product == "grapefruit")
        {
            price = quantity * 1.45;
        }
        else if (product == "kiwi")
        {
            price = quantity * 2.70;
        }
        else if (product == "pineapple")
        {
            price = quantity * 5.50;
        }
        else if (product == "grapes")
        {
            price = quantity * 3.85;
        }
        else
        {
            cout << "error" << endl;
        }
    }

    else if (day == "Saturday" || day == "Sunday")
    {
        if (product == "banana")
        {
            price = quantity * 2.70;
        }
        else if (product == "apple")
        {
            price = quantity * 1.25;
        }
        else if (product == "orange")
        {
            price = quantity * 0.90;
        }
        else if (product == "grapefruit")
        {
            price = quantity * 1.60;
        }
        else if (product == "kiwi")
        {
            price = quantity * 3.00;
        }
        else if (product == "pineapple")
        {
            price = quantity * 5.60;
        }
        else if (product == "grapes")
        {
            price = quantity * 4.20;
        }
        else
        {
            cout << "error" << endl;
        }

    }
    else {
        cout << "error" << endl;
    }


    if (price > 0)
    {
        cout.setf(ios::fixed);
        cout.precision(2);
        cout << price << endl;
    }

    return 0;


}