编程找到数组中出现最大值的元素并按降序对数组进行排序？ [英] Program to find the element which has maximum occurence in an array and sort the array in descending order?

问题描述

我有一个数组如



ar [] = {5,7 ，3,5,3,6,5,2,1}



在此我要打印出现次数最多的数字

o / p = 5（因为它在阵列中发生了3次）



并且还按降序排序



1,2,3,5,6,7



提前致谢

解决方案

< blockquote>这实际上应该有效，

  var  max = ar.GroupBy（x = >  x）.MaxBy（x = >  x.Count（））。First（）。Key; 

和降序，

  var  max = ar.GroupBy（x = >  x）.OrderByDescending（x = >  x.Count（ ））。第一个（）。键; 

如果它不起作用，请告诉我。 :)

见这个链接 [ ^ ]。



-KR

  int  [] array = { 5 ，< span class =code-digit> 7 ， 3 ， 5 ， 3 ， 6 ， 5 ， 2 ， 1 }; 

先按升序排序，然后按反向数组排序

 Array.Sort（array）; 
 Array.Reverse（array）; 
  foreach （ var  item  in  array）{Console.Write（item）; } 

要查找哪个号码有最大出现次数，请尝试：

  var  numOccurrencies =  new  Dictionary< int，int>（）; 
  int  numberWithMaxOccurrencies =  0 ; 
  int  maxOccurrences =  0 ; 
  foreach （ var  item  in 数组）
 {
  if （！numOccurrencies.ContainsKey（item））
 {
 numOccurrencies.Add（item ， 0 ）; 
} 
 numOccurrencies [item] ++; 
  if （numOccurrencies [item] >  maxOccurrences）
 {
 numberWithMaxOccurrencies = item; 
 maxOccurrences = numOccurrencies [item]; 
} 
} 
 Console.WriteLine（ 数字{0}有{1 } occurrencies。，numberWithMaxOccurrencies，maxOccurrences）; 

Hi ,

I have an array like

ar[]={5,7,3,5,3,6,5,2,1}

in this i want to print the number which has maximum occurrence
o/p=5 (because it has occurred 3 times in array)

and also do the sorting in descending order

1,2,3,5,6,7

Thanks in advance

解决方案

This should work actually,

var max = ar.GroupBy(x => x).MaxBy(x => x.Count()).First().Key;

and for Descending order,

var max = ar.GroupBy(x => x).OrderByDescending(x => x.Count()).First().Key;

Let me know if it is not working. :)
See this link[^] as well.

-KR

int[] array = { 5, 7, 3, 5, 3, 6, 5, 2, 1 };

Sort by ascending first, then reverse array

Array.Sort(array);
Array.Reverse(array);
foreach (var item in array) { Console.Write(item); }

To find which number has max occurencies try this:

var numOccurrencies = new Dictionary<int, int>();
int numberWithMaxOccurrencies = 0;
int maxOccurrences = 0;
foreach (var item in array)
{
    if (!numOccurrencies.ContainsKey(item))
    {
        numOccurrencies.Add(item, 0);
    }
    numOccurrencies[item]++;
    if (numOccurrencies[item] > maxOccurrences)
    {
        numberWithMaxOccurrencies = item;
        maxOccurrences = numOccurrencies[item];
    }
}
Console.WriteLine("Number {0} has {1} occurrencies.", numberWithMaxOccurrencies, maxOccurrences);

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