关于字符串操作的一些常用户到的一些基本东西..

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace string_传智博客园_
{
    class Program
    {
        static void Main(string[] args)
        {
            #region 接受用户的输入字符串，反序输出"abc"->"cba"
              //接受用户的输入字符串，反序输出"abc"->"cba"
            //string s = Console.ReadLine();
            //for (int i=s.Length-1;i >=0; i--)
            //{
            //    Console.Write(s[i]);
            //}
           
            //s[2]=c,s[1]=b,s[0]=a; 我们通过下标2到0不就输出对应的值？即反序输出
            #endregion

            #region 接受用户输入一句英文，将其中的单词反序输出。"hello c sharp"->"sharp c hello"
          //接受用户输入一句英文，将其中的单词反序输出。"hello c sharp"->"sharp c hello"
            //string sp = Console.ReadLine();
            //string[] words = sp.Split(' ');
            //for (int i = words.Length - 1; i >= 0;i-- )
            //{
            //    Console.Write(words[i]+" ");
            //}
            #endregion

            #region abc@qq.com 取出abc 和qq.com
          /*  //abc@qq.com 取出abc 和qq.com
            string email = Console.ReadLine();
            int atIndex = email.IndexOf('@');
            string usename = email.Substring(0, atIndex);
            string 域名 = email.Substring(atIndex+1);
            Console.WriteLine(usename);
            Console.WriteLine(域名);
           */
            #endregion

           #region ini格式文件
            string[] line = File.ReadAllLines(@"C:\Users\Administrator\Desktop\string(传智博客园)\string(传智博客园)\txt\sp.txt", Encoding.Default);
            foreach (string item in line)
            {
                string[] strs = item.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
                string title = strs[0];//标题
                string author = strs[1];//作者

                if (title.Length > 17)
                {
                    title = title.Substring(0, Math.Min(17, title.Length));
                    title = title + "....";
                }
                else
                {
                    title = title;
                }

                Console.WriteLine("{0}+++++{1}", title, author);
            }
            #endregion

        }
        static string GetString(string fileURL, string fileName)
        {
            string[] sp = File.ReadAllLines(fileURL, Encoding.Default);
            foreach (string item in sp)
            {
                string[] sts = item.Split(new char[] { '=', ' ' }, StringSplitOptions.RemoveEmptyEntries);
                string name = sts[0];
                string value = sts[1];
                if (name == fileName)//或者不要分割字符 直接 name.Trim()也可以；
                {
                    return value.Trim();
                }
            }
            return "错误";
        }
    }
}