写段程序统计一个字符串中重复字符出现的次数

[renzaijiang]

注意可能很长的字符哦也不是全是字母 考虑下算法效率哦
输入：

aaacccbbb33322145@#$

输出：
a 3
c 3
b 3
3 3
2 2

[止戈而立]

		string GetCharCount(string text)
		{
			string result=string.Empty;
			int len=text.Length;
			while(len>0)
			{
				string temp=text[0].ToString();
				text=text.Replace(temp,"");
				int count=len-text.Length;
				result+=temp+","+count+"\r\n";
				len=text.Length;
			}
			return result;
		}

[wuyi8808]

using System;
using System.Collections.Generic;

class A 
{ 
  static void Main()
  {
    string s = "aaacccbbb33322145@#$";
    Dictionary<char,int> count = GetCharCount(s);
    foreach (KeyValuePair<char,int> kvp in count)
    {
      Console.WriteLine("{0}:  {1}", kvp.Key, kvp.Value);
    }
  }
  
  static Dictionary<char,int> GetCharCount(string text)
  {
    Dictionary<char,int> d = new Dictionary<char,int>();
    foreach (char c in text)
    {
      if (d.ContainsKey(c)) d[c]++;
      else d[c] = 1;
    }
    return d;
  }
}
/* 程序输出：
a:  3
c:  3
b:  3
3:  3
2:  2
1:  1
4:  1
5:  1
@:  1
#:  1
$:  1
*/

[wuyi8808]

using System;
using System.Collections.Generic;

class A 
{ 
  static void Main()
  {
    string s = "aaacccbbb33322145@#$";
    Dictionary<char,int> count = GetCharCount(s);
    foreach (KeyValuePair<char,int> kvp in count)
    {
      if (kvp.Value > 1) Console.WriteLine("{0}: {1}", kvp.Key, kvp.Value);
    }
  }
  
  static Dictionary<char,int> GetCharCount(string text)
  {
    Dictionary<char,int> d = new Dictionary<char,int>();
    foreach (char c in text)
    {
      int n;
      d.TryGetValue(c, out n);
      d[c] = n + 1;
    }
    return d;
  }
}
/* 程序输出：
a:  3
c:  3
b:  3
3:  3
2:  2
*/

[春天的气息]

[Quote=引用 3 楼 wuyi8808 的回复:]
C# codeusing System;
using System.Collections.Generic;

class A
{
static void Main()
{
string s = "aaacccbbb33322145@#$";
Dictionary<char,int> count = GetCharCount(s);
foreach (KeyValuePair<char,int> kvp in count)
{
if (kvp.Value > 1) Console.WriteLine("{0}: {1}", kvp.Key, kvp.Value);
}
}

static Dictionary<char,int> GetCharCount(string text)
…
[/Quote]

算法不错，

[成都慢生活]

[Quote=引用 3 楼 wuyi8808 的回复:]
C# codeusing System;
using System.Collections.Generic;

class A
{
static void Main()
{
string s = "aaacccbbb33322145@#$";
Dictionary<char,int> count = GetCharCount(s);
foreach (KeyValuePair<char,int> kvp in count)
{
if (kvp.Value > 1) Console.WriteLine("{0}: {1}", kvp.Key, kvp.Value);
}
}

static Dictionary<char,int> GetCharCount(string text)
…
[/Quote]
很炫

[icehawk]

巧妙，学到一招，哈哈

[chengfong]

学这个吧：
http://www.soasp.net/CShape/

[chengfong]

学这个吧：
http://www.soasp.net/CShape/