C# -算法：字符串相似度

只写代码：

namespace 字符串相似度
{
    class Program
    {
        static void Main(string[] args)
        {
            string a = "efsdfdabcdefgaabcdefgaabcdefgaabcdefgasfabcdefgefsdfdabcdefgaabcdefgaabcdefgaabcdefgasfabcdefg";
            string b = "efsdfdabcdefgaabcdefgaaefsdfdabcdefgaabcdefgaabcdefgaabcdefgasfabcdabcdefggaabcdefgasfabcdefg";

            char[] arr = a.ToCharArray();
            char[] brr = b.ToCharArray();

            int len_a = a.Length;
            int len_b = b.Length;

            int[,] distance = InitArray(len_a, len_b, arr, brr);
            
            Console.WriteLine(distance[len_a, len_b]);
            Console.ReadLine();
        }
        static string ToString(int n)
        {
            if (n < 10) return "0" + n;
            return n + "";
        }
        //
        static int[,] InitArray(int len1, int len2,char[] a,char[] b)
        {
            var nums = new int[len1 + 1, len2 + 1];
            nums[0, 0] = 0;
            for (int i = 1; i <= len1; i++)
            {
                nums[i, 0] = i;
            }
            for (int j = 1; j <= len2; j++)
            {
                nums[0, j] = j;
            }
            for (int i = 1; i <= len1; i++)
            {
                for (int j = 1; j <= len2; j++)
                {
                    if (a[i - 1] == b[j - 1]) nums[i, j] = nums[i - 1, j - 1];
                    else nums[i, j] = Min(nums[i - 1, j], nums[i, j - 1], nums[i - 1, j - 1]) + 1;
                }
            }
                return nums;
        }
        static void WriteArray(int len_a,int len_b,char[]arr,char[]brr,int[,] distance)
        {
            for (int j = 0; j <= len_b; j++)
            {
                if (j > 0)
                    Console.Write(brr[j - 1] + "  ");
                else Console.Write("      ");
            }
            Console.WriteLine();
            for (int i = 0; i <= len_a; i++)
            {
                if (i > 0)
                    Console.Write(arr[i - 1] + " ");
                else Console.Write("  ");
                for (int j = 0; j <= len_b; j++)
                {
                    Console.Write(ToString(distance[i, j]) + " ");
                }
                Console.WriteLine();
            }
        }
        //动态规划法
        static int GetValue(char[] a, char[] b, int i, int j)
        {
            Console.WriteLine(i + "t" + j);
            if (i == 0)
                return j;
            if (j == 0)
                return i;
            if (a[i-1] == b[j-1]) return GetValue(a, b, i - 1, j - 1);
            else
            {
                int ins = GetValue(a, b, i, j - 1);
                int del = GetValue(a, b, i - 1, j);
                int rep = GetValue(a, b, i - 1, j - 1);
                return Min(ins, del, rep) + 1;
            }
        } 

        private static int Min(int p1, int p2, int p3)
        {
            int min = p1;
            if (p2 < min) min = p2;
            if (p3 < min) min = p3;
            return min;
        }
    }
}

最后

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