求平均成绩使用二维数组

using System;
class AverageofScore
{
 public static void Main()
 {
  int[,] student_score=new int [4,5];
  int temp;
  for(int i=0;i<=3;i++)
  {
   temp=0;
   for(int j=0;j<=4;j++)
   {
    Console.WriteLine ("请输入第{0}个学生的第{1}门功课:",i+1,j+1);
    student_score[i,j]=int.Parse (Console.ReadLine ());
    temp+=student_score[i,j];
   }
   Console.WriteLine ("This student's average of score is"+temp/5);
  }
 }
}