编写一个基于对话框的VC++程序，实现如下内容： 通过点击按钮一，打开并读入附件指定的1.txt 将其中每段数据的vertex后的三个数读入，每次读入三组数据。 -Write a dialog based VC++ program, to achieve the following: By clicking a button to open and read attachments specified 1.txt to which each piece of data, the nu