在Linux上QT的基本，QT程序开发
开发一个Qt应用程序的步骤：
1、　　先声明所需的窗口部件
2、　　设置它们的属性
3、　　然后再把这些窗口部件添加到布局中
4、　　根据Qt的信号/槽原理，创建并连接使用到的信号/槽，通过窗口部件之间的通信可管理用户的交互行为
5、　　程序的编译、链接和运行(Basic QT program development on Linux on QT
Steps to develop a Qt application:
1. Declare the required window components first
2. Set their attributes
3, and then add these window widgets to the layout
4, according to the Qt signal / slot principle, create and connect the signal / slot used, through the communication between the window components can manage the interactive behavior of the user
5. Compile, link and run the program)