ASP.NET不错的面试题2

1.找出数组中最大的值

 protected void Page_Load(object sender, EventArgs e)
    {
        int[] array ={ 1, 56, 78, 23, 124, 54, 98, 34, 96 };
        int index;
        string Res = GetMax<int>(array, out index);
        Response.Write(Res);
    }
    /// <summary>
    /// 找出数组中最大的值
    /// </summary>
    /// <typeparam name="T">数组类型</typeparam>
    /// <param name="Array">数组名称</param>
    /// <param name="index">最大值所对应的索引值</param>
    /// <returns></returns>
    public static string GetMax<T>(T[] Array, out int index) where T : IComparable
    {
        if (Array == null)
        {
            throw new ArgumentException("参数错误！");
        }
        T Max = Array[0];
        index = 1;
        for (int i = 0; i < Array.Length; i++)
        {
            if (Array[i].CompareTo(Max) > 0)
            {
                Max = Array[i];
                index = i;
            }
        }
         return string.Format("索引为：{0},对应的最大值是：{1}", index, Max);    }

2.找出字符串中出现最多的字符以及次数

  protected void Page_Load(object sender, EventArgs e)
    {
        string str = "CSDN GOD!";
        Response.Write(GetInfo(str));
    }
    public static string GetInfo(string str)
    {
        Dictionary<char, int> d = new Dictionary<char, int>();
        for (int i = 0; i < str.Length; i++)
        {
            if (d.ContainsKey(str[i]))
            {
                d[str[i]]++;
            }
            else
            {
                d[str[i]] = 1;
            }
        }
        char Max = str[0];
        foreach (KeyValuePair<char, int> temp in d)
        {
            if (temp.Value > d[Max])
            {
                Max = temp.Key;
            }
        }
       return string.Format("出现次数最多的值是：{0},次数是：{1}", Max, d[Max]);
    }