c6-03.cs

一本很好的教材.C#开发者必备.内容全面,很难得哦.

using System;
public class BoolTest 
{
   public static void Main() 
   {
      Console.Write("请输入一个字符: "); 
      char c = (char) Console.Read();
      if (Char.IsLetter(c)) 
         if (Char.IsLower(c))
            Console.WriteLine("字符是小写的。");
         else
            Console.WriteLine("字符是大写的。");
      else
         Console.WriteLine("字符不是字母。");
   }
}