这个是qt快速入门的第二章的源码，跟书本配套的，简单易懂很有帮助-This is the second chapter of the QT quick start of the source code, with the book matching, easy to understand and very helpful

这个是qt快速入门这本书的配套源代码，第三章的所有代码，下载可直接用-This is the QT quick start of the book supporting the source code, the third chapter of all the code, download can be used directly

这个是qt快速入门这本书的配套源码的第4到8章，下载直接可以编译通过。-This is the QT quick start of the book of the fourth to the 8 chapter of the source code, can be directly compiled download.