c# System.OverflowException 异常

Question

所以这是我的代码:

static void Main(string[] args)
{
    Console.WriteLine("How many numbers are you going to enter?");

    long num = long.Parse(Console.ReadLine());

    long[] nums = new long[num];
}

当我为“num”输入 10000000000 时，我得到

"System.OverflowException Arithmetic operation resulted in an overflow."

我该怎么做才能修复它？

Answer 1

您的代码溢出是因为 C# 中数组的最大大小为 Int32.MaxValue ，等于 2147483647。您可以在 source code 中看到相关提示, 并在 documentation 中明确说明:

By default, the maximum size of an Array is 2 gigabytes (GB). In a 64-bit environment, you can avoid the size restriction by setting the enabled attribute of the configuration element (<gcAllowVeryLargeObjects> introduced in .NET 4.5) to true in the run-time environment. However, the array will still be limited to a total of 4 billion elements, and to a maximum index of 0X7FEFFFFF (2146435071) in any given dimension (0X7FFFFFC7 (2147483591) for byte arrays and arrays of single-byte structures).