对于相当大的数字，无法将二进制转换为十进制

Question

我正在将二进制数转换为十进制数，直到我的数字似乎超过 $2^64$ 为止。似乎是因为数据类型不能容纳大于 $2^64$ 的数字，有什么见解吗？发生的事情是存储在我的 base_2 变量中的数字似乎无法超过 $2^64$，因为它在处理巨大的二进制数时应该如此，但它溢出了，因为数据类型太小并重置为 0...我有什么想法可以绕过这个问题或解决这个问题吗？

        //Vector to store the Binary # that user has input
        List<ulong> binaryVector = new List<ulong>();

        //Vector to store the Decimal Vector I will output
        List<string> decimalVector = new List<string>();

        //Variable to store the input
        string input = "";

        //Variables to do conversions
        ulong base2 = 1;
        ulong decimalOutput = 0;

        Console.WriteLine("2^64=" + Math.Pow(2.00,64));

        //Prompt User
        Console.WriteLine("Enter the Binary Number you would like to convert to decimal: ");
        input = Console.ReadLine();

        //Store the user input in a vector
        for(int i = 0; i < input.Length; i++)
        {
            //If we find a 0, store it in the appropriate vector, otherwise we found a 1..
            if (input[i].Equals('0'))
            {
                binaryVector.Add(0);
            }
            else
            {
                binaryVector.Add(1);
            }
        }

        //Reverse the vector
        binaryVector.Reverse();

        //Convert the Binary # to Decimal
        for(int i = 0; i < binaryVector.Count; i++)
        {
            //0101 For Example: 0 + (0*1) = 0 Thus: 0 is out current Decimal
            //While our base2 variable is now a multiple of 2 (1 * 2 = 2)..
            decimalOutput = decimalOutput + (binaryVector[i] * base2);
            base2 = base2 * 2;
            Console.WriteLine("\nTest base2 Output Position[" + i + "]::" + base2);
        }

        //Convert Decimal Output to String
        string tempString = decimalOutput.ToString();

Answer 1

一个ulong只能保存0到2**64之间的值；参见 UInt64.MaxValue。

如果要处理更大的值，请使用 BigInteger。

对于相当大的数字，无法将二进制转换为十进制

Having trouble converting in binary to decimal for rather large numbers

c#

binary

bits

bit-manipulation

binary-data