《An Introduction to Design Patterns in C++ with Qt 4》书籍的作者说：Using C++ with Qt comes very close to Java in ease of use, comprehensiveness, and convenience. It significantly exceeds Java in the areas of speed and efficiency, making everything from processing-intensive server applications to high-speed graphics-intensive games possible.

一般来说，使用Qt后，可以抛开STL，在某种程度上，抛开STL是必也要的。（ In fact, to take full advantage of Qt’s power and simplicity, we tend to abandon the Standard Library entirely.）。

Qt-Creator是Qt配套的IDE，但Qt-Creator也是一个通用的C、C++ IDE，可以开发任何通用的C++项目。Qt-Creator可以跨平台运行，集成Qt的帮助文档，非常好用。

我们首先创建一个简单的Qt Console Application，然后在main.cpp进行编辑，代码示例如下：

#include <QCoreApplication>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    qDebug() << "Hello World\n";
    return a.exec();
}

然后按Ctrl + R来编译和运行。

参考资料：

http://qt-project.org/

http://qt-project.org/downloads

http://qt-project.org/doc/qt-5/qdebug.html