大數運算算法詳解

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace 大數
{
    class Program
    {
        static void Main(string[] args)
        {
           int[]arr=new int[100];
           arr[arr.Length - 1] = 5;
           arr[arr.Length - 2] = 0;
           arr[arr.Length - 3] = 3;
           arr[arr.Length - 4] = 7;
            Opration(arr,48);
            for (int i = 0; i < arr.Length; i++)
            {
                Console.Write(arr[i]);
            }
            Console.ReadKey();
        }
        //定義一個大數運算方法
        static int[] Opration(int[] arr,int num)
        {
            //先把一個數與數組中的每一個元素相乘並存放到數組裡
            for (int i = 0; i < arr.Length; i++)
            {
                arr[i] *= num;
            }
         
           
            for (int i = arr.Length-1; i >0; i--)
            {
              
                //如何判斷每個數組元素數據的進和留
                //進
                arr[i - 1] = arr[i- 1] + arr[i] / 10;
                //留
                arr[i] = arr[i] % 10;
            }
            return arr;
        }
    }
}