查看捕获特定异常挑战的解决方案

5 分钟

以下代码是上一单元挑战的一种可能解决方案：

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.");

运行此应用程序时，它会将所需的消息打印到控制台作为输出：

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.

此代码只是“一种可能的解决方案”，因为有许多方法来更新异常处理逻辑。只要你根据挑战中的规则获得正确的结果，那么你就做得很棒！

如果成功了，恭喜你！继续进行下一个单元中的知识检查。

重要

如果在完成此项挑战时遇到问题，可能需要先回顾前面的几个单元，然后再继续。

查看捕获特定异常挑战的解决方案

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