Convert any positive number from base 2 till 16 to 10 base number - CSharp System

CSharp examples for System:Math Number

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Description

Convert any positive number from base 2 till 16 to 10 base number

Demo Code


using System.Text;
using System.Collections.Generic;
using System;//from ww  w.  j a  v  a2s. c o m

public class Main{
        /// <summary>
        /// Convert any positive number from base 2 till 16 to 10 base number
        /// </summary>
        public static long FromAnyTo10(string number, int baseFrom)
        {
            if (number[0] == '-')
            {
                throw new ArgumentException("I can't work with negative numbers!");
            }
            else if (baseFrom < 2 || baseFrom > 16)
            {
                throw new ArgumentException("I can't work with numbers with base smaller than 2 and greater than 16!");
            }

            int[] digits = new int[number.Length];

            for (int i = 0; i < digits.Length; i++)
            {
                int temp = 0;

                switch (number[i])
                {
                    case 'A': temp = 10; break;
                    case 'B': temp = 11; break;
                    case 'C': temp = 12; break;
                    case 'D': temp = 13; break;
                    case 'E': temp = 14; break;
                    case 'F': temp = 15; break;
                    default: temp = int.Parse(number[i].ToString()); break;
                }

                digits[i] = temp;
            }

            long result = 0;
            int power = number.Length - 1;

            for (int i = 0; i < digits.Length; i++)
            {
                result += digits[i] * Numbers.NumberToPower(baseFrom, power);
                power--;
            }

            return result;
        }
}

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