c# - 我引用了一个常量类静态变量，但是当我这样做时，值会以某种方式改变

Question

这是我引用的常量类。下面是试图使用引用的类。

这是我收到的错误消息。

ConstantClass 的类型初始值设定项引发异常 ---> System.OverflowException:对于 Decimal，值太大或太小。

有什么想法吗？

using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace UnitTests
{
    [TestClass]

    public static class ConstantClass
    {
        public static int positiveInt = 10;
        public static int negativeInt = -10;
        public static long positivePastLimitInt = unchecked((int)2147483648);
        public static long negativePastLimitInt = unchecked((int)-2147483649);
        public static int zeroInt = 0;


        public static char lowerChar = 'c';
        public static char spaceChar = ' ';
        public static char symbolChar = '@';
        public static char numberChar = '1';
        public static char upperChar = 'D';

        public static string lowerString = "hello";
        public static string upperString = "HELLO";
        public static string emptyString = "";
        public static string spaceString = " ";
        public static string tabString = "    ";
        public static string symbolString = "!^&";
        public static string nullString = null;

        public static short positiveShort = 10;
        public static short negativeShort = -10;
        public static short zeroShort = 0;
        public static int positivePastLimitShort = unchecked((short)32768);
        public static int negativePastLimitShort = unchecked((short)-32769);

        public static long positiveLong = 10;
        public static long negativeLong = -10;
        public static long zeroLong = 0;
        public static Int64 positivePastLimitLong = (long)2147483648;
        public static Int64 negativePastLimitLong = (long)-2147483649;

        public static double positiveDouble = 10.0;
        public static double negativeDouble = -10.0;
        public static double zeroDouble = 0.0;
        public static double positiveLimitDouble = double.MaxValue;
        public static double negativeLimitDouble = double.MinValue;

        public static float positiveFloat = 10.0F;
        public static float negativeFloat = -10.0F;
        public static float zeroFloat = 0.0F;
        public static double positivePastLimitFloat = (float)float.MaxValue + 1;
        public static double negativePastLimitFloat = (float)float.MinValue - 1;

        public static bool positiveBool = true;
        public static bool negativeBool = false;


        //Here is the variable im trying to use.
        public static decimal positiveDecimal = 10.0m;
        public static decimal negativeDecimal = -10.0m;
        public static decimal zeroDecimal = 0.0m;
        public static decimal positivePastLimitDecimal = Convert.ToDecimal(80000000000000E+40);
        public static decimal negativePastLimitDecimal = Convert.ToDecimal(-8000000000000E-40);
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace UnitTests
{
    [TestClass]
    public class ByteDecimalTests
    {
        /// <summary>
        /// 
        /// </summary>
        [TestMethod]
        public void DecimalToBytes_WhenDecimalIsPositive()
        {
            //This is where i reference the constant class
            Decimal positiveDecimal = ConstantClass.positiveDecimal;
            //Decimal positiveDecimal = 12.98m;
            String positiveDecimalString = positiveDecimal.ToString();

            byte[] positiveDecimalArray = Encoding.ASCII.GetBytes(positiveDecimalString);
            byte[] array = ByteDecimal.DecimalToBytes(positiveDecimal);

            System.Diagnostics.Debug.WriteLine(Encoding.Default.GetString(positiveDecimalArray));
            System.Diagnostics.Debug.WriteLine(Encoding.Default.GetString(array));
            Assert.AreEqual(array, positiveDecimalArray);

        }
   }
}

Answer 1

你的问题在这里:

 public static decimal positivePastLimitDecimal = Convert.ToDecimal(80000000000000E+40)
 public static decimal negativePastLimitDecimal = Convert.ToDecimal(-8000000000000E-40);

您不能将如此大的数字存储在小数中。为此使用 float 或 double。

maximum value你可以存储在一个小数是:79,228,162,514,264,337,593,543,950,335。