5.17

/* 5.17 Calculating Sales
        Deitel & Deitel C++ How to Program, 10th ed (Indian subcontinent adaptation)
    Visual Studio Community 2019 */

#include<iostream>
using namespace std;

int main() {
    int itemNum{ 0 }, quant;
    double total{ 0.0 };
    while (true) {
        cout << "Please enter item # (1-5). Enter 6 to end.\n";
        cin >> itemNum;
        if (itemNum < 1 || itemNum > 6) {
            cout << "Invalid item.\n\n";
            continue;
        }
        if (itemNum == 6) {
            cout << "\nDone purchasing. Calculating order...\n\n";
            break;
        }
        cout << "Please enter the quantity of item " << itemNum << " you wish to buy\n";
        cin >> quant;
        switch (itemNum) {
        case 1:
            cout << "These are $2.98 each\n";
            total += quant * 2.98;
            cout << "Your running total is now: " << "$"<< total << "\n\n";
            break;
        case 2:
            cout << "These are $4.50 each\n";
            total += quant * 4.50;
            cout << "Your running total is now: " << "$"<< total << "\n\n";
            break;
        case 3:
            cout << "These are $9.98 each\n";
            total += quant * 9.98;
            cout << "Your running total is now: " << "$"<< total << "\n\n";
            break;
        case 4:
            cout << "These are $4.49 each\n";
            total += quant * 4.49;
            cout << "Your running total is now: " << "$" << total << "\n\n";
            break;
        case 5:
            cout << "These are $6.87 each\n";
            total += quant * 6.87;
            cout << "Your running total is now: " << "$" << total << "\n";
            break;
        }
    }
    cout << "Total cost: " << total << "\n\n";

    return 0;
}