确保用户输入在多个输入上加倍

Question

在C＃，控制台中，我正在提示用户输入输入，我想确保它们是双重的，如果没有，则会提示用户重新输入该值。

这是我的代码：

    public static void userExpenses() {

        Console.Write("Enter your Monthly Income (before deductions): ");
        Program.Income = double.Parse(Console.ReadLine());

        Console.Write("Enter your estimated monthly tax: ");
        Program.Deductions[0] = Int32.Parse(Console.ReadLine());

        Console.Write("Enter monthly expenses for 1. Groceries: ");
        Program.Deductions[1] = Int32.Parse(Console.ReadLine());

        Console.Write("Enter monthly expenses for 2. Water + Lights: ");
        Program.Deductions[2] = Int32.Parse(Console.ReadLine());

        Console.Write("Enter monthly expenses for 3. Transportation: ");
        Program.Deductions[3] = Int32.Parse(Console.ReadLine());

        Console.Write("Enter monthly expenses for 4. Phone/s: ");
        Program.Deductions[4] = Int32.Parse(Console.ReadLine());

        Console.Write("Enter monthly expenses for 5. Other: ");
        Program.Deductions[5] = Int32.Parse(Console.ReadLine());
    }

有办法做到这一点吗？

Answer 1

您可以使用以下内容：

public static decimal GetValueFromUser(string query)
{
    Console.Write(query);
    while(!decimal.TryParse(Console.ReadLine(), out decimal result))
    {
        Console.Write("Error: Input was not a number. Try again:")
    }
    return result;
}

用法：

Program.Income = GetValueFromUser("Enter your Monthly Income (before deductions): ");

思维：我使用十进制，因为浮点类型在处理金钱时确实很糟糕。您可以选择使用double或int。他们也有一个tryparse方法。