简单且全面的QT例子，有主窗体可弹出3个不同功能的窗体，其中控制窗体已完善，可针对不同的参数输入数据并保存于目录下的TXT文件中，可供系统进行处理。-A simple but efficiency example for QT. User could reach 3 different widgets throught main widget. And they could input data in "operate_form" and save them in order to some n

qt的widget类操作 内有详细注解 是学习QT的很好的小例子-qt of the widget class operations with detailed annotations are good to learn a small example of QT