using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace 计算字符
{
class Program
{
static void Main(string[] args)
{
string str = "Welecome to China world";
Dictionary dict=new Dictionary();
foreach (char ch in str.ToLower())
{
if (dict.ContainsKey(ch))
{
dict[ch]++;
}
else
{
dict[ch] = 1;
}
}
foreach (char cha in dict.Keys)
{
Console.WriteLine(cha.ToString()+"="+dict[cha]);
}
Console.ReadKey();
}
}
}
计算重复字符 用Dictionary，通过dictionary[key]就可以得到其Value值，如果要得到key可以用Dictionary.key属性