下面是代码草稿:

using System;
using System.Collections;
using System.Collections.Generic;
namespace Ch05Ex07p
{
class Program
{
static int[] MaxValueInt(int[] doubleArray)
{
int[] maxArray = new int[doubleArray.Length];
int maxVal = doubleArray[0];
for (int i = 1; i < doubleArray.Length; i++)
{
if (doubleArray[i] > maxVal)
maxVal = doubleArray[i];
}
int p = 0;
for (int i = 0; i < doubleArray.Length; i++)
{
if (doubleArray[i] == maxVal)
{
maxArray[p++] = doubleArray[i];
}
}
return maxArray;
//return maxVal;
}
static double MaxValue(double[] doubleArray) //这是求最大值的可以不看
{
double maxVal = doubleArray[0];
for (int i = 1; i < doubleArray.Length; i++)
{
if (doubleArray[i] > maxVal)
maxVal = doubleArray[i];
}
return maxVal;
}
static double[] PublicVal(double[] doubleArray)
{
/* double publicVal = doubleArray[0];
// int timenum = 0;
int[] timenum;
int[] times = new int[doubleArray.Length];
for (int i = 0; i < doubleArray.Length; i++)
{
for (int n = 0; n < doubleArray.Length; n++)
{
if (doubleArray[i] == doubleArray[n])
times[i] = ++times[i];
}
}
timenum = MaxValueInt(times);
/* for (int x = 0; x < times.Length; x++)
{
if (times[x] == timenum)
return doubleArray[x];
}//改写挺麻烦的，我自己写个好了
*/
List<double> list = new List<double>();
double[] array = new double[doubleArray.Length];
int[] arraytick = new int[doubleArray.Length];
for (int i = 0; i < arraytick.Length; i++)
arraytick[i] = 0;
int p = 0;
for (int i = 0; i < doubleArray.Length; i++)
{
int index = list.FindIndex(delegate(double pp) {return pp==doubleArray[i]; });

if ( index== -1)
{
array[p] = doubleArray[i];
arraytick[p++]++;
list.Add(doubleArray[i]);
}
else
{
arraytick[index]++;
}
}
ArrayList doublemax = new ArrayList();
int max = arraytick[0];
for (int i = 1; i < arraytick.Length; i++)
{
if (arraytick[i] > max)
max = arraytick[i];
}
for (int i = 0; i < arraytick.Length; i++)
{
if (arraytick[i] == max)
doublemax.Add(array[i]);
}
double[] res = new double[doublemax.Count];
for (int i = 0; i < doublemax.Count; i++)
{
res[i] = (double)doublemax[i];
}
return res;
}

static void Main(string[] args)
{
double maxVal;
double[] publicVal;
double[] numbers ={ 10, 10, 6,6,10, 6, 9, 0 };


maxVal = MaxValue(numbers);


Console.WriteLine("最大值为{0}", maxVal);
publicVal = PublicVal(numbers);
foreach (double p in publicVal)
{
Console.Write(p);
Console.Write(" ");
}
Console.WriteLine();
}
}
}
可以了，即使出现多个众数，都没问题

非常感谢!!!!!发自肺腑~