我有這個作業,我們必須使用嘗試和捕捉,以確保用戶不輸入負數的甜甜圈和非整數數據。當我輸入一個負數時,我得到了try/catch的工作,以便它再次要求輸入甜甜圈的數量,但是當我輸入一個字母而不是數字來表示甜甜圈的數量時,它會出現我爲但它不能再次輸入甜甜圈的數量。如果有人能幫助我,將不勝感激。謝謝。這就是我得到了我的代碼:捕捉輸入錯誤
using System;
public class CostofDonuts
{
public static void Main()
{
string lastName;
int number_Of_Donuts;
double Total_Cost, Final_Cost;
try
{
// Get user to input their last name
Console.Write("Enter customer's last name -> ");
lastName = Convert.ToString(Console.ReadLine());
//Get user to input amount of donuts purchased. Ensure that the integer inputted is positive.
do
{
Console.Write("Enter the amount of donuts purchased -> ");
number_Of_Donuts = Convert.ToInt32(Console.ReadLine());
if (number_Of_Donuts < 0)
Console.WriteLine("Invalid input, number of donuts must be positive");
} while (number_Of_Donuts <= 0);
//Calculate cost of donuts
if (number_Of_Donuts < 6)
Total_Cost = number_Of_Donuts * 0.5;
if (number_Of_Donuts <= 15)
Total_Cost = number_Of_Donuts * 0.4;
else
Total_Cost = number_Of_Donuts * 0.3;
//Calculate cost with tax
if (number_Of_Donuts < 12)
Final_Cost = (Total_Cost + 0.25) * 1.13;
else
Final_Cost = Total_Cost + 0.25;
// Output final results
Console.WriteLine("{0} bought {1} donuts which came to a total of {2:C}", lastName, number_Of_Donuts, Final_Cost);
Console.ReadLine();
}
catch (FormatException e)
{
Console.WriteLine("Input must be a positive integer");
}
catch (Exception e)
{
Console.WriteLine("Input must be a positive integer");
}
}
}
你的try/catch需要在一個循環內;現在,如果拋出一個異常,它會跳出do/while循環並離開該方法。 –