使用C#分别计算字符串中的字符 [英] Count the characters individually in a string using c#

问题描述

我有一个字符串如下:

string str = "ssmmmjjkkkkrrr"

使用C#，我需要显示每个字符的计数，如下所示:

Using C#, I need to display the count of each individual character as follows:

 s = 2
 m = 3
 j = 2
 k = 4
 r = 3

谢谢.

推荐答案

最简单的方法是使用LINQ:

The simplest way would be to use LINQ:

var counted = text.GroupBy(c => c)
                  .Select(g => new { g.Key, Count = g.Count() });

foreach (var result in counted)
{
    Console.WriteLine("{0} = {1}", result.Key, result.Count);
}

或更简短地说:

foreach (var group in text.GroupBy(c => c))
{
    Console.WriteLine("{0} = {1}", group.Key, result.Count());
}

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