檢閱攔截特定例外狀況挑戰的解決方案

已完成

下列程式代碼是上一個單元中挑戰的可能解決方案：

checked
{
    try
    {
        int num1 = int.MaxValue;
        int num2 = int.MaxValue;
        int result = num1 + num2;
        Console.WriteLine("Result: " + result);
    }
    catch (OverflowException ex)
    {
        Console.WriteLine("Error: The number is too large to be represented as an integer. " + ex.Message);
    }
}

try
{
    string? str = null;
    int length = str.Length;
    Console.WriteLine("String Length: " + length);
}
catch (NullReferenceException ex)
{
    Console.WriteLine("Error: The reference is null. " + ex.Message);
}

try
{
    int[] numbers = new int[5];
    numbers[5] = 10;
    Console.WriteLine("Number at index 5: " + numbers[5]);
}
catch (IndexOutOfRangeException ex)
{
    Console.WriteLine("Error: Index out of range. " + ex.Message);
}

try
{
    int num3 = 10;
    int num4 = 0;
    int result2 = num3 / num4;
    Console.WriteLine("Result: " + result2);
}
catch (DivideByZeroException ex)
{
    Console.WriteLine("Error: Cannot divide by zero. " + ex.Message);
}

Console.WriteLine("Exiting program.");

當您執行此應用程式時，它會將所需的訊息列印至主控台作為輸出：

Error: The number is too large to be represented as an integer. Arithmetic operation resulted in an overflow.
Error: The reference is null. Object reference not set to an instance of an object.
Error: Index out of range. Index was outside the bounds of the array.
Error: Cannot divide by zero. Attempted to divide by zero.
Exiting program.

此程序代碼只是「一個可能的解決方案」，因為有許多方式可以更新例外狀況處理邏輯。 只要您在挑戰中根據規則取得正確的結果，您就做得很棒！

如果您已成功，恭喜！ 繼續進行下一個單元中的知識檢定。

這很重要

如果您無法順利完成此挑戰，您應該在繼續之前先複習上一個單元中的內容。