1 /// <summary>
2 /// 计算每个字符出现的次数且打印
3 /// </summary>
4 /// <param name="str"></param>
5 public void CharCount(string str)
6 {
7 Dictionary<char, int> dicCount = new Dictionary<char, int>();
8 str = str.ToLower();
9 foreach (char item in str.ToCharArray())
10 {
11 if (!Char.IsLetter(item))
12 continue;
13 if (!dicCount.ContainsKey(item))
14 {
15 dicCount.Add(item, 1);
16 }
17 else
18 {
19 dicCount[item]++;
20 }
21 }
22
23 foreach (var item in dicCount.Keys)
24 {
25 Console.WriteLine("字符{0}:出现{1}次",item,dicCount[item]);
26 }
27 }
