说明：  这是一个Linux下用C语言编写的信用卡授权程序，程序采用C/S模式，服务器代表店主，客户访问服务器并请求得到服务器的受权，从顾客的信用卡中收取费用。
(This is a Linux C language prepared by the credit card authorization procedures, procedures using C/S mode, servers represent shopkeepers, customers access the server requests the server to be authorized, the credit card customers from charging fees.)