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// 07-map.cpp : calculate prices from associative array of products and per-weight cost

import std;

using namespace std;

int main() {

map<string,double> products{

{ "Apples", 0.65 },

{ "Oranges", 0.85 },

{ "Bananas", 0.45 },

{ "Pears", 0.50 }

};

cout.precision(2);

cout << fixed;

for (;;) {

cout << "Please choose: Add product, Calculate price, Quit\nEnter one of A, C, Q: ";

char opt;

cin >> opt;

opt = toupper(opt);

if (opt == 'Q') {

break;

}

else if (opt == 'A') {

cout << "Enter product and price-per-kilo: ";

string product;

double price;

cin >> product >> price;

product.front() = toupper(product.front());

products.insert(pair{ product, price });

}

else if (opt == 'C') {

for (const auto& p : products) {

cout << p.first << '\t' << p.second << "/kg\n";

}

cout << "Enter product and quantity: ";

string product;

double quantity;

cin >> product >> quantity;

product.front() = toupper(product.front());

auto iter = products.find(product);

if (iter != end(products)) {

cout << "Price: " << iter->second * quantity << '\n';

}

else {

cout << "Could not find \"" << product << "\"\n";

}

else {

cout << "Option not recognized.\n";

}