c# - 如何在 C# 中限制循环次数

Question

如果每次“购买”都在新行中，我的代码会添加总和，但我只希望它们能够进行 5 次输入。将此代码作为控制台应用程序复制并粘贴到 visual studio 中，然后调试或运行它或其他任何方式。我是 C# 的新手，想知道如何只允许 5 个数字。我尽量不偏离下面的代码太远。话虽这么说，可能有更先进的方法来做到这一点，但我不想要那样。

namespace SumFiveDoubles
{
    class TotalPurchase
    {
        static void Main()
        {
            double purchase;
            double total = 0;
            string inputString;
            const double QUIT = 0;
            Console.Write("Enter a purchase amount >> ");
            inputString = Console.ReadLine();
            purchase = Convert.ToDouble(inputString);
            while (purchase != QUIT)
            {
                total += purchase;
                Console.Write("Enter another purchase amount or " + QUIT + " to calculate >> "); //I only want this to appear 4 more times\\
                inputString = Console.ReadLine();
                purchase = Convert.ToDouble(inputString);
            }
            Console.WriteLine("Your total is {0}", total.ToString("C"));
        }
    }
}

Answer 1

int count = 0;
while (purchase != QUIT && ++count < 5)