这是我找书上的例子，自己敲上的代码，都是些小程序，希望和大家分享，更希望管理员能够开通我的帐号，以后我会更加努力地参与，谢谢！-This is the book I look for examples of their knock on the code, are sideshows to the procedure, hoping to share with you and hope that administrators can open my account, I will be more