สอบถามโค้ด C# การหารเพื่อเอาเศษและแสดงค่าที่รับและวนออกมาค่ะ

int[] score;
int x = 0;
int sum;

score = new int[4];

for (int n = 0; n < score.Length; n++)
{
    Console.Write("Enter n[" + n + "] :");
    x = int.Parse(Console.ReadLine());
sum = x % 10;
Console.WriteLine();
Console.Write("Output...\n");
Console.WriteLine();
Console.Write("Last digit of n is {0}\n", sum);
}

int[] score;
int x = 0;
string sum;

score = new int[4];

for (int n = 0; n < score.Length; n++)
{
    Console.Write("Enter n[" + n + "] :");
    x = int.Parse(Console.ReadLine());
 sum += " " + x +"%"+ 10 +":" +  x % 10 ;
}

Console.WriteLine();
Console.Write("Output...\n");
Console.WriteLine();
Console.Write("Last digit of n is {0}\n", sum);

            int[] score;
            int x = 0;
            int[] sum;

            score = new int[4];
            sum = new int[4];

            for (int n = 0; n < score.Length; n++)
            {
                Console.Write("Enter n[" + n + "] :");
                x = int.Parse(Console.ReadLine());
                sum[n] = x % 10;
            }
            Console.WriteLine();
            Console.Write("Output...\n");
            Console.WriteLine();
            string show = "";
            for (int n = 0; n < score.Length; n++)
            {
                show += sum[n] + " ";
            }
            Console.Write("Last digit of n is {0}\n", show);
            Console.Read();