选择排序

int[] arr = { 23, 44, 66, 11, 3, 76, 98, 9, 7 };
int temp = 0;
int pos = 0;
for (int i = 0; i < arr.Length; i++)
{
    pos = i;
    for (int j = i + 1; j < arr.Length; j++)
    {
        if (arr[j] < arr[pos])
        {
            pos = j;
        }
    }
    temp = arr[i];
    arr[i] = arr[pos];
    arr[pos] = temp;
}