我這里有一個例子,請幫忙分析一下!
using System;
public class ScoreList
{
// private field Array scores
public int[] scores = new int[5];
// indexer
public int this[int index]
{
get
{
return scores[index];
}
set
{
if (value >= 0 && value <= 10)
{
scores[index] = value;
}
}
}
/// <summary>
/// property Average (read only)
/// </summary>
public int Average
{
get
{
int sum = 0;
foreach(int score in scores)
{
sum += score;
}
return sum/scores.Length;
}
}
}
class IndexSample
{
static void Main()
{
ScoreList sl = new ScoreList();
sl[0] = 9;
sl[1] = 8;
sl[2] = 7;
sl[3] = sl[4] = sl[1];
Console.WriteLine("sl.Average() = {0}",sl.Average);
}
}