multiply two numbers without using *operator

Hello friend,
You can as below
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Forums23042012
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(Prod(10,10));
        }
        static int Prod(int a,int b)
        {
            if (a != 0 && b != 0)
            {
                int sum = 0;
                for (int i = 0; i < b; i++)
                {
                    sum += a;
                }
                return sum;
            }
            else
            {
                return 0;
            }
        }
    }
}

Hi Gaurav,


Try this...


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication13
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
           MessageBox.Show(multiply(5, 5).ToString());
        }



        private  int multiply(int a, int b)

        {

        int   result=0, i=0;

        while(i != b)
        {
        result = addition(result,a);
        i =   addition(i,1);
         }

     return result;
}

        private int addition(int a, int b)

{
  int result =   0, carry;
  carry = a&b;

  if(Convert.ToBoolean(carry))
   {
     result = a^b;
     carry =   carry << 1;
     result = addition(carry, result);
    }
  else
   {
     result =   a^b;
   }

  return result;

}

}
   
}




Thanks
If this post helps you mark it as answer

Try this: