So we were asked to convert a Hexadecimal Value (stored in a String) to its Decimal Value. Each character in the String should be manually converted to decimal within a loop, and then post the total Decimal Value of the Hexadecimal Value. I got here the codes that I have written but I couldn't identify where I could have gone wrong for an "F4" Hexa (as an example) to have a Decimal Equivalent of "292" instead of "244". I have debugged everything, the code seems fine. Any ideas?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace AdvProgCS
{
class Program
{
static int dec=0;
static string hex;
static void Main(string[] args)
{
do{
Console.Write("[Press 0 to Stop] Hexadecimal Value: ");
hex = Console.ReadLine();
if (hex == "0") break;
int length = hex.Length;
for (int i = 0; i < length+1; i++)
{
if (hex[i] == 'A' || hex[i] == 'B' || hex[i] == 'C' || hex[i] == 'D' || hex[i] == 'E' || hex[i] == 'F')
{
if (hex[i] == 'A')
dec+= 10 * Convert.ToInt32(Math.Pow(16, length - 1));
if (hex[i] == 'B')
dec += 11 * Convert.ToInt32(Math.Pow(16, length - 1));
if (hex[i] == 'C')
dec += 12 * Convert.ToInt32(Math.Pow(16, length - 1));
if (hex[i] == 'D')
dec += 13 * Convert.ToInt32(Math.Pow(16, length - 1));
if (hex[i] == 'E')
dec += 14 * Convert.ToInt32(Math.Pow(16, length - 1));
if (hex[i] == 'F')
dec += 15 * (Convert.ToInt32(Math.Pow(16, length - 1)));
}
else
dec += hex[i];
length--;
}
Console.WriteLine("DECIMAL EQUIVALENT: " + dec + "\n");
}
while(hex != "0");
}
}
}