短信收发测试程序。程序通过手机发送短信给自己，然后启动接收程序。接收后，计算从发送成功到接收成功的时间。利用本程序可以通过电脑的超级终端来测试短信中心的工作效率。-Message to send and receive test procedure. Procedures through the mobile phone to send text messages to their own, and then start to receive the procedure. Reception a