在QT基础上用C++实现的UNDO和REDO功能

新建一个应用程序，并添加两个Label控件，三个Edit控件，四个Button按钮。其中两个edit输入框用于输入整数，一个Edit输入框用于输出结果；Label标签控件用于显示当前所做的运算（例如：当单击加法按钮时即做加法运算，则label标签显示”+”号。）；四个Button按钮分别完成加、减、乘、除运算。 编写程序，输入两个整数，顺序执行两个数的加、减、乘、除计算结果并输出。 -Create a new application, and add two Label controls, three Edit controls, four Button button. Two of them used to edit input box enter an integer, an input box for Edit output Label label control used to display the current operation done (for example: When you click that button to do adder addition operations, the labels show label " + " sign.) four Button button respectively add, subtract, multiply, with the exception of computing. Programming, enter the two integers, the order of the implementation of both the number of add, subtract, multiply, with the exception of the calculation results and output.

几个经典的按钮（非原创）-several classic button (non-original)

平淡真好 我喜欢平淡，因为平淡正是深沉。平淡不是平，而在它的平中有醇美，淡中有深情，正如平谈的香水，在似有似无之间，给人一种飘逸；正如平淡的画，在简简疏疏之中，予人一种幽远。-plain nice I like plain, which is deeply uninteresting. Ping is not uninteresting, and it is- the wonderful, desalination is a passionate, as the perfume-Tan, in seeming between people living in a grace; As insipid painting, Jane SR-Duleimi, entertainment performances.

普通的音量调节功能,大家可以下下来看一看.-Common regulatory function of the volume, we can take a look at the next down.

一个非常好的，自绘圆形CButton按钮的例子-A very good example of radio button from the painting

在VC环境下的3D按扭-VC environment in 3D buttons

PNG图标按钮 可以做到半透明效果 希望大家喜欢-PNG icon button translucent effect can be done hope you like

一个非常好的控件，对美化你的界面非常重要，好好学习哦-a very good controls on landscaping your interface very important to learn oh

很精致小巧的Tabs控件，tabs能容纳更多的更多的功能-very delicate tiny Tabs controls, tabs can accommodate more more functions

VC++中进行word表格的填写。非常好的一个实例，大家可以看看。-VC++ In word fill in forms. An example of very good, everyone can see.