11. Fruit Shop

#include <iostream>
using namespace std;

int main()
{
	string fruit, dayOfWeek;
	double quantity;

	cin >> fruit >> dayOfWeek >> quantity;

	double price = 0;
	if (dayOfWeek == "Saturday" || dayOfWeek == "Sunday") {
		if (fruit == "banana") {
			price = 2.7;
		}
		else if (fruit == "apple") {
			price = 1.25;
		}
		else if (fruit == "orange") {
			price = 0.9;
		}
		else if (fruit == "grapefruit") {
			price = 1.6;
		}
		else if (fruit == "kiwi") {
			price = 3;
		}
		else if (fruit == "pineapple") {
			price = 5.6;
		}
		else if (fruit == "grapes") {
			price = 4.2;
		}
	}
	else if (dayOfWeek == "Monday" || dayOfWeek == "Tuesday" || dayOfWeek == "Wednesday" || dayOfWeek == "Thursday" || dayOfWeek == "Friday"){
		if (fruit == "banana") {
			price = 2.5;
		}
		else if (fruit == "apple") {
			price = 1.2;
		}
		else if (fruit == "orange") {
			price = 0.85;
		}
		else if (fruit == "grapefruit") {
			price = 1.45;
		}
		else if (fruit == "kiwi") {
			price = 2.7;
		}
		else if (fruit == "pineapple") {
			price = 5.5;
		}
		else if (fruit == "grapes") {
			price = 3.85;
		}
	}

	cout.setf(ios::fixed);
	cout.precision(2);

	if (price == 0) {
		cout << "error" << endl;
	}
	else {
		cout << price * quantity << endl;
	}
}