3.创建一个按钮控件

qt

1.创建按钮并显示

1. main.cpp

   #include <QApplication>
   #include <QDebug>
   #include <QWidget>
   
   int main(int argc, char *argv[]) {
     QApplication a(argc, argv);
     QWidget *hw = new QWidget(); // main GUI window
     hw->show();                  // hw is the real window
     QPushButton *button = new QPushButton("Click Me", hw);
     button->show();
   
     return a.exec();
   }