#include <iostream>
#include <cstdlib>
#include <string>
using namespace std;

int items {0};
double total {0.0};
void machine(double p);

int main(){

	struct snack {
		string name;
		double price;
		string id;
	};
	const snack c[]{
		{"Chips", 4.99, "A1"},
		{"Candy bar", 1.99, "A2"},
		{"Can of soda", 2.99, "A3"},
		{"Bottle of water", 0.99, "A4"},
		{"Candy", 2.99, "A5"}
	};

	for(int i {0}; i < 5; i++){
		cout << c[i].name << ", " << c[i].price << ", " << c[i].id <<"\n";
	}
	
	string b {""};
	while (b != "A0"){
		cout << "Please input the id for each item you want. Press 'A0' to cancel.\n";
		cin >> b;
		if (!cin){
			cerr << "Invalid input. Please try again.\n";
			continue;
		}
		else if (b == "A0"){
			continue;
		}
		else if (b != "A1" && b != "A2" && b != "A3" && b != "A4" && b != "A5"){
			cerr << "Invalid input. Please try again.\n";
			continue;
		}
		if(b == "A1"){
			machine(c[0].price);
		}
		else if(b == "A2"){
			machine(c[1].price);
		}
		else if(b == "A3"){
			machine(c[2].price);
		}
		else if(b == "A4"){
			machine(c[3].price);
		}
		else{
			machine(c[4].price);
		}
		cout << "Would you like anything else? (Y/N)\n";
		string ans {""};
		cin >> ans;
		while(ans != "N" && ans != "Y"){
			cerr << "Invalid reply. Would you like another item? (Y/N)\n";
			cin >> ans;
		}
		if(ans == "N"){
			break;
		}
		else{
			continue;
		}

	}
	cout << "You have chosen " << items << " items for a total of $" << total << ".\n";
		return EXIT_SUCCESS;
}

void machine(double p)
{
        items++;
	total += p;
}