c++ - 帮助实现一个 "store buying"程序

Question

我的教授指示我们制作一个类似星巴克的菜单，用户可以在其中继续输入订单直到完成。我在循环中显示了菜单，但无法将输入的订单相加并显示总数。

#include <iostream>
using namespace std;

int main()
{
    int choice = 1;

    cout << endl << "Welcome to Hunterbucks!";

    while (choice > 0)
    {
        cout << endl << "Input -1 when you're finished ordering!";
        cout << endl << endl << "Coffee" << " " << "($)";
        cout << endl << "1. Regular" << " " << "1.50";
        cout << endl << "2. Decaf" << " " << "1.23";
        cout << endl << "3. Americano" << " " << "2.25";
        cout << endl << "4. Espresso" << " " << "2.25";
        cout << endl << "5. Latte" << " " << "2.50";
        cout << endl << "6. Cappuccino" << " " << "2.75";
        cout << endl << "7. Frappuccino" << " " << "2.75";
        cout << endl << "8. Macchiato" << " " << "2.50";

        cout << endl << endl << "Snacks" << " " << "($)";
        cout << endl << "9. Muffin" << " " << "1.00";
        cout << endl << "10. Blueberry Muffin" << " " << "1.25";
        cout << endl << "11. Raspberry Muffin" << " " << "1.25";
        cout << endl << "12. Scone" << " " << "0.75";
        cout << endl << "13. Blueberry Scone" << " " << "1.00";
        cout << endl << "14. Croissant" << " " << "0.75";

        cout << endl << endl << "What would you like to order? ";       
        cin >> choice;

        if (choice <= 0)
            cout << endl << "Thank you for your order.";
        else 
            cout << endl << "What else would you like to order?";

    }

    cout << endl << "Thank you for choosing Hunterbucks! Come again soon.";

    return 0;
}

有什么信息可以帮助我吗？我只是一个初学者，已经尝试了几个小时。

Answer 1

在伪代码中你想要这样的东西:

float total = 0.0;
while (choice > 0)
{
    ....
    cin >> choice;

    if (choice <= 0)
        cout << endl << "Thank you for your order.";
    else
    {
        total += costs[choice]; 
        cout << endl << "What else would you like to order?";
    }

}

您需要定义一个名为 costs 的数组，其中包含每个项目的成本。您还需要处理用户输入的验证，这样您就不会错误地尝试读取 costs 数组范围之外的内容。