C#数组作为函数参数

using System;

namespace ArrayApplication {

   class MyArray {

      double getAverage(int[] arr, int size) {
         int i;
         double avg;
         int sum = 0;

         for (i = 0; i < size; ++i) {
            sum += arr[i];
         }
         avg = (double)sum / size;
         return avg;
      }

      static void Main(string[] args) {
         MyArray app = new MyArray();

         /* an int array with 5 elements */
         int [] balance = new int[]{1000, 2, 3, 17, 50};
         double avg;

         /* pass pointer to the array as an argument */
         avg = app.getAverage(balance, 5 ) ;

         /* output the returned value */
         Console.WriteLine( "Average value is: {0} ", avg );
         Console.ReadKey();
      }
   }
}

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